./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/xor2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba --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 134cd77c565ec0964d690e2c701df7f2f34c79dd30f80feda5f549f6f11dd00c --- 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-b5237d8 [2022-11-22 00:19:25,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:19:25,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:19:25,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:19:25,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:19:25,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:19:25,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:19:25,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:19:25,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:19:25,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:19:25,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:19:25,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:19:25,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:19:25,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:19:25,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:19:25,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:19:25,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:19:25,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:19:25,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:19:25,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:19:25,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:19:25,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:19:25,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:19:25,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:19:25,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:19:25,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:19:25,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:19:25,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:19:25,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:19:25,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:19:25,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:19:25,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:19:25,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:19:25,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:19:25,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:19:25,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:19:25,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:19:25,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:19:25,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:19:25,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:19:25,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:19:25,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:19:25,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:19:25,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:19:25,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:19:25,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:19:25,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:19:25,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:19:25,640 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:19:25,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:19:25,640 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:19:25,640 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:19:25,641 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:19:25,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:19:25,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:19:25,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:19:25,643 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:19:25,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:19:25,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:19:25,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:19:25,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:19:25,644 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:19:25,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:19:25,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:19:25,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:19:25,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:19:25,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:19:25,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:19:25,647 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:19:25,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:19:25,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:19:25,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:19:25,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:19:25,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:19:25,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:19:25,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:19:25,649 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:19:25,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:19:25,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:19:25,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:19:25,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:19:25,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:19:25,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:19:25,650 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_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134cd77c565ec0964d690e2c701df7f2f34c79dd30f80feda5f549f6f11dd00c [2022-11-22 00:19:25,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:19:25,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:19:25,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:19:25,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:19:25,992 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:19:25,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-crafted/xor2.i [2022-11-22 00:19:29,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:19:29,232 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:19:29,233 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/sv-benchmarks/c/array-crafted/xor2.i [2022-11-22 00:19:29,239 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/data/35b629cbd/4a8bf90a5aac480aad54a9381f5ee0ac/FLAGbcec3fc1a [2022-11-22 00:19:29,255 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/data/35b629cbd/4a8bf90a5aac480aad54a9381f5ee0ac [2022-11-22 00:19:29,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:19:29,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:19:29,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:19:29,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:19:29,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:19:29,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2301c8e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29, skipping insertion in model container [2022-11-22 00:19:29,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:19:29,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:19:29,454 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_b1549218-d00d-4e73-8618-7c930c43529b/sv-benchmarks/c/array-crafted/xor2.i[1291,1304] [2022-11-22 00:19:29,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:19:29,468 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:19:29,487 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_b1549218-d00d-4e73-8618-7c930c43529b/sv-benchmarks/c/array-crafted/xor2.i[1291,1304] [2022-11-22 00:19:29,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:19:29,499 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:19:29,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29 WrapperNode [2022-11-22 00:19:29,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:19:29,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:19:29,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:19:29,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:19:29,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,536 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-11-22 00:19:29,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:19:29,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:19:29,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:19:29,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:19:29,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,586 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:19:29,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:19:29,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:19:29,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:19:29,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (1/1) ... [2022-11-22 00:19:29,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:19:29,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:29,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:19:29,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:19:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:19:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:19:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:19:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:19:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:19:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:19:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:19:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-11-22 00:19:29,698 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-11-22 00:19:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:19:29,805 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:19:29,807 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:19:30,115 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:19:30,245 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:19:30,245 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 00:19:30,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:30 BoogieIcfgContainer [2022-11-22 00:19:30,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:19:30,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:19:30,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:19:30,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:19:30,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:19:29" (1/3) ... [2022-11-22 00:19:30,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdafb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:19:30, skipping insertion in model container [2022-11-22 00:19:30,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:29" (2/3) ... [2022-11-22 00:19:30,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdafb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:19:30, skipping insertion in model container [2022-11-22 00:19:30,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:30" (3/3) ... [2022-11-22 00:19:30,271 INFO L112 eAbstractionObserver]: Analyzing ICFG xor2.i [2022-11-22 00:19:30,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:19:30,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:19:30,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:19:30,380 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;@62f6df0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:19:30,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:19:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:19:30,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:30,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:30,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -491286142, now seen corresponding path program 1 times [2022-11-22 00:19:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:30,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037079293] [2022-11-22 00:19:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:19:30,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037079293] [2022-11-22 00:19:30,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037079293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:30,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:30,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:19:30,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108687600] [2022-11-22 00:19:30,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:30,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:30,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:19:30,841 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 00:19:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:30,895 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-22 00:19:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-22 00:19:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:30,906 INFO L225 Difference]: With dead ends: 33 [2022-11-22 00:19:30,906 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:19:30,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:19:30,917 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:30,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:19:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 00:19:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-22 00:19:30,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-22 00:19:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:30,971 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-22 00:19:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 00:19:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-22 00:19:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 00:19:30,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:30,977 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:30,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:19:30,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash -292682821, now seen corresponding path program 1 times [2022-11-22 00:19:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368825174] [2022-11-22 00:19:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:19:31,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368825174] [2022-11-22 00:19:31,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368825174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535934221] [2022-11-22 00:19:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:31,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:31,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:19:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:19:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:19:31,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:19:31,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535934221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:31,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:31,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-22 00:19:31,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455064449] [2022-11-22 00:19:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:31,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:31,438 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 00:19:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:31,477 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-22 00:19:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-22 00:19:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:31,483 INFO L225 Difference]: With dead ends: 29 [2022-11-22 00:19:31,484 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 00:19:31,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:31,485 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:31,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 00:19:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-22 00:19:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-22 00:19:31,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-22 00:19:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:31,491 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-22 00:19:31,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 00:19:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-22 00:19:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 00:19:31,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:31,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:31,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:31,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:31,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash -746001070, now seen corresponding path program 1 times [2022-11-22 00:19:31,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:31,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467976490] [2022-11-22 00:19:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:31,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:19:31,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467976490] [2022-11-22 00:19:31,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467976490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503655135] [2022-11-22 00:19:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:31,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:31,810 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:31,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:19:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:31,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:19:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 00:19:31,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:19:31,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503655135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:31,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:31,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-22 00:19:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249118625] [2022-11-22 00:19:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:31,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:31,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:31,960 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 00:19:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:31,985 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-22 00:19:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-22 00:19:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:31,986 INFO L225 Difference]: With dead ends: 27 [2022-11-22 00:19:31,987 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 00:19:31,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:31,988 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:31,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 00:19:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 00:19:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-22 00:19:31,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-22 00:19:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:31,995 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-22 00:19:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 00:19:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-22 00:19:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:19:31,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:31,996 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:32,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 00:19:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:32,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1071769984, now seen corresponding path program 1 times [2022-11-22 00:19:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:32,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49192612] [2022-11-22 00:19:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:32,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:19:32,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49192612] [2022-11-22 00:19:32,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49192612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120600586] [2022-11-22 00:19:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:32,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:32,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:19:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:19:32,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:19:32,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:19:32,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120600586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:32,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911791374] [2022-11-22 00:19:32,617 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:32,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:32,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:32,628 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:32,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:32,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,758 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:19:32,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 00:19:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,797 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:19:32,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:19:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-22 00:19:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:33,052 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-22 00:19:33,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-22 00:19:33,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:19:33,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:33,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:19:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:33,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-22 00:19:33,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:33,766 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-22 00:19:33,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-22 00:19:33,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:19:33,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:19:34,031 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:19:34,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:39,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:39,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:39,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:39,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-22 00:19:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277644989] [2022-11-22 00:19:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:19:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:19:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-22 00:19:39,255 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:19:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:39,289 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-22 00:19:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:19:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-22 00:19:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:39,290 INFO L225 Difference]: With dead ends: 36 [2022-11-22 00:19:39,291 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 00:19:39,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-22 00:19:39,292 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:39,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 00:19:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-22 00:19:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-22 00:19:39,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-22 00:19:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:39,298 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-22 00:19:39,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:19:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-22 00:19:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 00:19:39,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:39,299 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:39,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:39,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:39,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash 856384007, now seen corresponding path program 2 times [2022-11-22 00:19:39,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:39,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635082346] [2022-11-22 00:19:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:39,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:19:39,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635082346] [2022-11-22 00:19:39,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635082346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:39,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881327420] [2022-11-22 00:19:39,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:39,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:39,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:39,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:39,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:19:39,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:19:39,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:39,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:19:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:19:39,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:19:39,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881327420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548711061] [2022-11-22 00:19:39,782 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:39,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:39,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:39,783 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:39,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,834 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:19:39,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:19:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:19:39,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-22 00:19:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:40,016 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-22 00:19:40,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-22 00:19:40,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:19:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:40,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:19:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:40,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:40,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:19:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:40,353 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:19:40,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:19:40,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:19:40,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:19:40,531 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:19:40,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:47,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_xor_~res~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_12 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_12 4294967296) (- 4294967296))))) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:47,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:47,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:47,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-22 00:19:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604357624] [2022-11-22 00:19:47,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:47,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:19:47,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:19:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:19:47,653 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:19:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:47,695 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-22 00:19:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:19:47,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-22 00:19:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:47,696 INFO L225 Difference]: With dead ends: 38 [2022-11-22 00:19:47,696 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 00:19:47,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:19:47,697 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:47,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 00:19:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-22 00:19:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-22 00:19:47,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-22 00:19:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:47,703 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-22 00:19:47,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:19:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-22 00:19:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:19:47,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:47,704 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:47,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:47,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:47,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1091113086, now seen corresponding path program 3 times [2022-11-22 00:19:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:47,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939817246] [2022-11-22 00:19:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:47,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-22 00:19:48,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939817246] [2022-11-22 00:19:48,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939817246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:48,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900957621] [2022-11-22 00:19:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:19:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:48,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:48,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:19:48,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:19:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:19:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-22 00:19:48,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-22 00:19:48,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900957621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:48,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682656054] [2022-11-22 00:19:48,283 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:48,283 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:48,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:48,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:48,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,319 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:19:48,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 00:19:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,348 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:19:48,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:19:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-22 00:19:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:48,521 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-22 00:19:48,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-22 00:19:48,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:19:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:19:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:48,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:19:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:48,904 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:19:48,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:19:48,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:19:48,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:19:49,042 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:19:49,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:52,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_xor_~res~0_BEFORE_RETURN_17 Int)) (= (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_17 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_17 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_17 4294967296) (- 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:52,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:52,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:52,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-22 00:19:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781767498] [2022-11-22 00:19:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:52,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:19:52,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:52,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:19:52,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:19:52,129 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 00:19:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:52,185 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-22 00:19:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:19:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-22 00:19:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:52,186 INFO L225 Difference]: With dead ends: 49 [2022-11-22 00:19:52,186 INFO L226 Difference]: Without dead ends: 31 [2022-11-22 00:19:52,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:19:52,188 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:52,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-22 00:19:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-22 00:19:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-22 00:19:52,193 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-22 00:19:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:52,194 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-22 00:19:52,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 00:19:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-22 00:19:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 00:19:52,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:52,195 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:52,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:52,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:19:52,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 947141090, now seen corresponding path program 4 times [2022-11-22 00:19:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:52,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004082738] [2022-11-22 00:19:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 00:19:52,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:52,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004082738] [2022-11-22 00:19:52,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004082738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:52,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024997469] [2022-11-22 00:19:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:19:52,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:52,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:52,824 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:52,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:19:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:19:52,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 00:19:52,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 00:19:53,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024997469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855524533] [2022-11-22 00:19:53,229 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:53,229 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:53,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:53,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:53,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:53,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,264 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:19:53,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:19:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:19:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-22 00:19:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,416 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-22 00:19:53,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-22 00:19:53,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:19:53,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:19:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:53,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:19:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:53,725 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:19:53,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:19:53,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:19:53,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:19:53,869 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:19:53,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:56,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:56,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:56,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:56,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-22 00:19:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065964647] [2022-11-22 00:19:56,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 00:19:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 00:19:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 00:19:56,968 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:19:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:57,050 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-22 00:19:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 00:19:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-22 00:19:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:57,056 INFO L225 Difference]: With dead ends: 62 [2022-11-22 00:19:57,057 INFO L226 Difference]: Without dead ends: 43 [2022-11-22 00:19:57,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 00:19:57,060 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:57,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-22 00:19:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-22 00:19:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:19:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-22 00:19:57,074 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-22 00:19:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:57,075 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-22 00:19:57,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:19:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-22 00:19:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 00:19:57,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:57,081 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:57,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:57,287 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 961965218, now seen corresponding path program 5 times [2022-11-22 00:19:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:57,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758231873] [2022-11-22 00:19:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 00:19:58,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:58,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758231873] [2022-11-22 00:19:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758231873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333136848] [2022-11-22 00:19:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:58,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:58,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:58,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:19:58,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:19:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:19:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-22 00:19:58,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-22 00:19:58,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333136848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:58,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371493057] [2022-11-22 00:19:58,516 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:58,516 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:58,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:58,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:58,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,547 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:19:58,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 00:19:58,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,573 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:19:58,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:19:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-22 00:19:58,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,708 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-22 00:19:58,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-22 00:19:58,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:19:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:19:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-22 00:19:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:58,992 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-22 00:19:58,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-22 00:19:59,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:19:59,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:19:59,159 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:19:59,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:20:04,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 999 |ULTIMATE.start_main_~i~2#1|) (exists ((v_xor_~res~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_30 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_30 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_30 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:20:04,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:20:04,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:20:04,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-22 00:20:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793004468] [2022-11-22 00:20:04,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:20:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 00:20:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 00:20:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 00:20:04,481 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:20:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:04,599 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-22 00:20:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 00:20:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-22 00:20:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:04,604 INFO L225 Difference]: With dead ends: 69 [2022-11-22 00:20:04,604 INFO L226 Difference]: Without dead ends: 50 [2022-11-22 00:20:04,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 00:20:04,606 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:04,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:20:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-22 00:20:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-22 00:20:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:20:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-22 00:20:04,613 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-22 00:20:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:04,613 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-22 00:20:04,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:20:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-22 00:20:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:20:04,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:04,615 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:04,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:04,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:04,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2071215813, now seen corresponding path program 6 times [2022-11-22 00:20:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:04,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031752924] [2022-11-22 00:20:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:04,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:05,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031752924] [2022-11-22 00:20:05,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031752924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430092834] [2022-11-22 00:20:05,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:20:05,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:05,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:05,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:20:06,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:20:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:20:06,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 00:20:06,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:06,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:20:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:07,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430092834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:20:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817515732] [2022-11-22 00:20:07,078 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:20:07,079 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:20:07,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:20:07,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:20:07,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:20:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,112 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:20:07,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:20:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:20:07,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-22 00:20:07,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,265 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-22 00:20:07,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-22 00:20:07,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:20:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:20:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-22 00:20:07,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:07,515 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-22 00:20:07,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-22 00:20:07,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:20:07,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:20:07,705 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:20:07,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:20:10,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:20:10,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:20:10,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:20:10,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-22 00:20:10,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214793948] [2022-11-22 00:20:10,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:20:10,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-22 00:20:10,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-22 00:20:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 00:20:10,966 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:20:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:11,097 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-22 00:20:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-22 00:20:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-22 00:20:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:11,100 INFO L225 Difference]: With dead ends: 100 [2022-11-22 00:20:11,101 INFO L226 Difference]: Without dead ends: 75 [2022-11-22 00:20:11,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 00:20:11,105 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:11,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:20:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-22 00:20:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-22 00:20:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:20:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-22 00:20:11,124 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-22 00:20:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:11,125 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-22 00:20:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:20:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-22 00:20:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 00:20:11,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:11,132 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:11,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:11,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 00:20:11,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1741539426, now seen corresponding path program 7 times [2022-11-22 00:20:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386214866] [2022-11-22 00:20:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:14,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386214866] [2022-11-22 00:20:14,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386214866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494137737] [2022-11-22 00:20:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:20:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:14,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:14,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:20:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 00:20:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:14,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:20:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:17,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494137737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:20:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543802868] [2022-11-22 00:20:17,903 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:20:17,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:20:17,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:20:17,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:20:17,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:20:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:17,945 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:20:17,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:20:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:17,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:20:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:17,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-22 00:20:18,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:20:18,119 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-22 00:20:18,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-22 00:20:18,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:20:18,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:20:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:20:18,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:20:18,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:18,425 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:20:18,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:20:18,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:20:18,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:20:18,566 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:20:18,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:20:22,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (exists ((v_xor_~res~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_xor_~res~0_BEFORE_RETURN_41 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 00:20:22,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:20:22,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:20:22,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-11-22 00:20:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278013030] [2022-11-22 00:20:22,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:20:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-22 00:20:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-22 00:20:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-22 00:20:22,181 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:20:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:22,450 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-22 00:20:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-22 00:20:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-22 00:20:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:22,452 INFO L225 Difference]: With dead ends: 150 [2022-11-22 00:20:22,452 INFO L226 Difference]: Without dead ends: 125 [2022-11-22 00:20:22,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-22 00:20:22,459 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:22,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:20:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-22 00:20:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-22 00:20:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:20:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-22 00:20:22,479 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-11-22 00:20:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:22,479 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-22 00:20:22,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:20:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-22 00:20:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-22 00:20:22,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:22,482 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:22,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:20:22,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1928403586, now seen corresponding path program 8 times [2022-11-22 00:20:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:22,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936289016] [2022-11-22 00:20:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-22 00:20:31,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936289016] [2022-11-22 00:20:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936289016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307414707] [2022-11-22 00:20:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:20:31,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:31,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:31,076 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:31,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:20:31,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:20:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:20:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:20:31,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-11-22 00:20:31,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:20:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-11-22 00:20:31,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307414707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:20:31,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704642217] [2022-11-22 00:20:31,603 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:20:31,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:20:31,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:20:31,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:20:31,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:20:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,633 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:20:31,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 00:20:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,664 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:20:31,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:20:31,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-22 00:20:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,799 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-22 00:20:31,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-22 00:20:31,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:20:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:20:31,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:31,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:20:31,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:20:32,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:20:32,056 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:20:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:20:32,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:20:32,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:20:32,190 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:20:32,254 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:20:40,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (exists ((v_xor_~res~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_48 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_48 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_48 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:20:40,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:20:40,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:20:40,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-11-22 00:20:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185870215] [2022-11-22 00:20:40,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:20:40,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-22 00:20:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-22 00:20:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 00:20:40,451 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:20:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:40,673 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-22 00:20:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-22 00:20:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-22 00:20:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:40,676 INFO L225 Difference]: With dead ends: 155 [2022-11-22 00:20:40,676 INFO L226 Difference]: Without dead ends: 130 [2022-11-22 00:20:40,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 00:20:40,680 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:40,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:20:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-22 00:20:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-22 00:20:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:20:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-22 00:20:40,695 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-11-22 00:20:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:40,696 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-22 00:20:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:20:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-22 00:20:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-22 00:20:40,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:40,699 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:40,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 00:20:40,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:40,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2040643067, now seen corresponding path program 9 times [2022-11-22 00:20:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534864368] [2022-11-22 00:20:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:40,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:20:48,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534864368] [2022-11-22 00:20:48,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534864368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:48,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703282125] [2022-11-22 00:20:48,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:20:48,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:48,131 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:20:48,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:20:48,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:20:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-22 00:20:48,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:20:48,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:21:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:21:01,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703282125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:21:01,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512165154] [2022-11-22 00:21:01,677 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:21:01,678 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:21:01,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:21:01,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:21:01,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:21:01,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,717 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:21:01,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:21:01,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:21:01,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-22 00:21:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:01,886 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-22 00:21:01,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-22 00:21:01,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:21:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:02,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:21:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:02,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:21:02,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:21:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:21:02,117 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:21:02,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:21:02,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:21:02,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:21:02,245 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:21:02,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:21:06,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7125#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:21:06,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:21:06,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:21:06,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2022-11-22 00:21:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490719448] [2022-11-22 00:21:06,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:21:06,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-22 00:21:06,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:21:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-22 00:21:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20562, Invalid=25877, Unknown=1, NotChecked=0, Total=46440 [2022-11-22 00:21:06,549 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:21:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:21:07,263 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2022-11-22 00:21:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-22 00:21:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-11-22 00:21:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:21:07,266 INFO L225 Difference]: With dead ends: 260 [2022-11-22 00:21:07,266 INFO L226 Difference]: Without dead ends: 231 [2022-11-22 00:21:07,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=20562, Invalid=25877, Unknown=1, NotChecked=0, Total=46440 [2022-11-22 00:21:07,271 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:21:07,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:21:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-22 00:21:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-22 00:21:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:21:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2022-11-22 00:21:07,294 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2022-11-22 00:21:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:21:07,295 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2022-11-22 00:21:07,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:21:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2022-11-22 00:21:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-22 00:21:07,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:21:07,299 INFO L195 NwaCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:21:07,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:21:07,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:21:07,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:21:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:21:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash -130501150, now seen corresponding path program 10 times [2022-11-22 00:21:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:21:07,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934932108] [2022-11-22 00:21:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:21:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:21:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:21:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:21:34,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:21:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934932108] [2022-11-22 00:21:34,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934932108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:21:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844168076] [2022-11-22 00:21:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:21:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:21:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:21:34,546 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:21:34,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:21:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:21:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-22 00:21:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:21:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:21:35,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:22:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:22:31,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844168076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:22:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300616465] [2022-11-22 00:22:31,113 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:22:31,113 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:22:31,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:22:31,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:22:31,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:22:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,155 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:22:31,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 00:22:31,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,194 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:22:31,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:22:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-22 00:22:31,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:22:31,368 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-22 00:22:31,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-22 00:22:31,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:22:31,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:22:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:22:31,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:22:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:22:31,707 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:22:31,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:22:31,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:22:31,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:22:31,865 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:22:31,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:22:42,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10032#(and (exists ((v_xor_~res~0_BEFORE_RETURN_60 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_60 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_60 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_60 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:22:42,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:22:42,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:22:42,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2022-11-22 00:22:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933981712] [2022-11-22 00:22:42,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:22:42,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-22 00:22:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:22:42,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-22 00:22:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2022-11-22 00:22:42,359 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:22:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:22:45,241 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2022-11-22 00:22:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-22 00:22:45,244 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-11-22 00:22:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:22:45,248 INFO L225 Difference]: With dead ends: 462 [2022-11-22 00:22:45,248 INFO L226 Difference]: Without dead ends: 433 [2022-11-22 00:22:45,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 83.4s TimeCoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2022-11-22 00:22:45,259 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:22:45,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:22:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-22 00:22:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-22 00:22:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:22:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2022-11-22 00:22:45,285 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2022-11-22 00:22:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:22:45,285 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2022-11-22 00:22:45,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:22:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2022-11-22 00:22:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-11-22 00:22:45,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:22:45,298 INFO L195 NwaCegarLoop]: trace histogram [402, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:22:45,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:22:45,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 00:22:45,514 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:22:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:22:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1150322050, now seen corresponding path program 11 times [2022-11-22 00:22:45,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:22:45,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203081791] [2022-11-22 00:22:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:22:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:22:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:24:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 00:24:43,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:24:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203081791] [2022-11-22 00:24:43,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203081791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:24:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214717400] [2022-11-22 00:24:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:24:43,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:24:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:24:43,099 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:24:43,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:24:43,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 00:24:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:24:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:24:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:24:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 81291 trivial. 0 not checked. [2022-11-22 00:24:45,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:24:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 81537 trivial. 0 not checked. [2022-11-22 00:24:46,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214717400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:24:46,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904323677] [2022-11-22 00:24:46,959 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:24:46,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:24:46,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:24:46,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:24:46,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:24:46,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:46,996 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:24:46,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:24:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:24:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-22 00:24:47,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:24:47,171 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-22 00:24:47,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-22 00:24:47,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:24:47,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:24:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:24:47,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-22 00:24:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:24:47,507 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-22 00:24:47,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-22 00:24:47,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:24:47,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:24:47,658 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:24:47,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:24:55,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14973#(and (exists ((v_xor_~res~0_BEFORE_RETURN_65 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_65 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_65 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_65 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:24:55,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:24:55,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:24:55,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2022-11-22 00:24:55,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719689426] [2022-11-22 00:24:55,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:24:55,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2022-11-22 00:24:55,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2022-11-22 00:24:55,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2022-11-22 00:24:55,047 INFO L87 Difference]: Start difference. First operand 433 states and 437 transitions. Second operand has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:24:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:24:57,966 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2022-11-22 00:24:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2022-11-22 00:24:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 458 [2022-11-22 00:24:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:24:57,971 INFO L225 Difference]: With dead ends: 471 [2022-11-22 00:24:57,971 INFO L226 Difference]: Without dead ends: 442 [2022-11-22 00:24:57,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 86.7s TimeCoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2022-11-22 00:24:57,987 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:24:57,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:24:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-22 00:24:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-11-22 00:24:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:24:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2022-11-22 00:24:58,016 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2022-11-22 00:24:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:24:58,017 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2022-11-22 00:24:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:24:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2022-11-22 00:24:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-11-22 00:24:58,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:24:58,029 INFO L195 NwaCegarLoop]: trace histogram [403, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:24:58,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:24:58,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:24:58,238 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:24:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:24:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1264933371, now seen corresponding path program 12 times [2022-11-22 00:24:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:24:58,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142956881] [2022-11-22 00:24:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:24:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:24:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:26:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-22 00:26:47,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:26:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142956881] [2022-11-22 00:26:47,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142956881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:26:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883851709] [2022-11-22 00:26:47,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:26:47,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:26:47,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:26:47,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:26:47,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:26:48,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:26:48,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:26:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-22 00:26:48,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:26:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-22 00:26:49,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:30:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-22 00:30:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883851709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:30:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798845614] [2022-11-22 00:30:32,683 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:30:32,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:30:32,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:30:32,684 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:30:32,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:30:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,721 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:30:32,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 00:30:32,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:30:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-22 00:30:32,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:32,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:30:32,866 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-22 00:30:32,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-22 00:30:32,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:30:33,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:33,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 00:30:33,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:33,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-22 00:30:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:30:33,177 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-22 00:30:33,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-22 00:30:33,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-22 00:30:33,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:30:33,325 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-22 00:30:33,385 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:30:46,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20396#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 1000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 3996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 999 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 00:30:46,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:30:46,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:30:46,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2022-11-22 00:30:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081389683] [2022-11-22 00:30:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:30:46,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-22 00:30:46,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:30:46,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-22 00:30:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328514, Invalid=349637, Unknown=1, NotChecked=0, Total=678152 [2022-11-22 00:30:46,157 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:31:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:04,362 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2022-11-22 00:31:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-22 00:31:04,364 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 467 [2022-11-22 00:31:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:04,368 INFO L225 Difference]: With dead ends: 884 [2022-11-22 00:31:04,368 INFO L226 Difference]: Without dead ends: 847 [2022-11-22 00:31:04,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 301.6s TimeCoverageRelationStatistics Valid=328514, Invalid=349637, Unknown=1, NotChecked=0, Total=678152 [2022-11-22 00:31:04,411 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:04,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 00:31:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-22 00:31:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2022-11-22 00:31:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.003562945368171) internal successors, (845), 842 states have internal predecessors, (845), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:31:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2022-11-22 00:31:04,458 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2022-11-22 00:31:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:04,458 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2022-11-22 00:31:04,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 00:31:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2022-11-22 00:31:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-11-22 00:31:04,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:04,469 INFO L195 NwaCegarLoop]: trace histogram [808, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:04,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:04,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1549218-d00d-4e73-8618-7c930c43529b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:04,672 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:04,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1538108386, now seen corresponding path program 13 times [2022-11-22 00:31:04,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:04,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682615924] [2022-11-22 00:31:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:04,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat