./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:53,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:53,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:56:53,422 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:53,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:53,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:53,469 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:53,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:53,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:53,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:53,476 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:53,477 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:53,478 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:53,479 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:53,480 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:53,480 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:53,481 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:53,481 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:53,481 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:53,482 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:53,482 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:53,483 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:53,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:53,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:53,485 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:53,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:53,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:53,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:53,487 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:53,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:53,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:53,489 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:53,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:53,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:53,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:53,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:53,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:53,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:53,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:53,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:53,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:53,492 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:53,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:53,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:53,493 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:53,493 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:53,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:53,494 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2023-11-24 23:56:53,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:53,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:53,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:53,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:53,879 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:53,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2023-11-24 23:56:57,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:57,217 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:57,218 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2023-11-24 23:56:57,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/data/e6f16f763/c4a3242a72904ab4aea7cd54d3fdcc48/FLAG6eb6e1cbc [2023-11-24 23:56:57,240 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/data/e6f16f763/c4a3242a72904ab4aea7cd54d3fdcc48 [2023-11-24 23:56:57,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:57,245 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:57,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:57,246 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:57,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:57,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b75d8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57, skipping insertion in model container [2023-11-24 23:56:57,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,277 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:57,436 WARN L240 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_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-11-24 23:56:57,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:57,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:57,487 WARN L240 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_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-11-24 23:56:57,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:57,541 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:57,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57 WrapperNode [2023-11-24 23:56:57,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:57,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:57,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:57,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:57,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,635 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-11-24 23:56:57,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:57,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:57,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:57,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:57,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,680 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:57,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:57,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:57,684 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:57,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (1/1) ... [2023-11-24 23:56:57,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:57,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:57,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:56:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:56:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:57,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:56:57,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:56:57,866 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:57,870 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:58,052 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:58,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:58,089 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:56:58,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:58 BoogieIcfgContainer [2023-11-24 23:56:58,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:58,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:58,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:58,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:58,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:57" (1/3) ... [2023-11-24 23:56:58,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa116df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:58, skipping insertion in model container [2023-11-24 23:56:58,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:57" (2/3) ... [2023-11-24 23:56:58,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa116df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:58, skipping insertion in model container [2023-11-24 23:56:58,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:58" (3/3) ... [2023-11-24 23:56:58,101 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2023-11-24 23:56:58,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:58,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:56:58,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:58,188 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=LoopHeads, 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;@5a84161c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:58,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:56:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:56:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:56:58,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:58,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:58,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:58,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:58,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1269016545, now seen corresponding path program 1 times [2023-11-24 23:56:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783115961] [2023-11-24 23:56:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:58,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:58,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:58,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783115961] [2023-11-24 23:56:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783115961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:58,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:56:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642907392] [2023-11-24 23:56:58,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:58,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:58,609 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:58,678 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2023-11-24 23:56:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:58,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:56:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:58,695 INFO L225 Difference]: With dead ends: 36 [2023-11-24 23:56:58,696 INFO L226 Difference]: Without dead ends: 21 [2023-11-24 23:56:58,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:58,708 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:58,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:56:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-24 23:56:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-24 23:56:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:56:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-24 23:56:58,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2023-11-24 23:56:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:58,764 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-24 23:56:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-24 23:56:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:56:58,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:58,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:56:58,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:58,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1475863465, now seen corresponding path program 1 times [2023-11-24 23:56:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585704908] [2023-11-24 23:56:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:58,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585704908] [2023-11-24 23:56:58,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585704908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:58,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705760900] [2023-11-24 23:56:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:58,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:58,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:58,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:56:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:59,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 23:56:59,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:59,166 INFO L378 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 11 treesize of output 7 [2023-11-24 23:56:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:59,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:59,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-24 23:56:59,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-24 23:56:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:59,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705760900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868270430] [2023-11-24 23:56:59,835 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-24 23:56:59,836 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:56:59,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:56:59,847 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:56:59,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:57:00,204 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-24 23:57:00,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:57:00,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '159#(and (exists ((|v_ULTIMATE.start_main_~index~0#1_39| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_39|) (not (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) 0) 4294967296) 0)) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_39| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-24 23:57:00,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:57:00,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:57:00,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 8] total 15 [2023-11-24 23:57:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617896515] [2023-11-24 23:57:00,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:57:00,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:57:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:57:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:57:00,686 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:57:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:01,055 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-11-24 23:57:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:57:01,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 23:57:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:01,057 INFO L225 Difference]: With dead ends: 47 [2023-11-24 23:57:01,058 INFO L226 Difference]: Without dead ends: 32 [2023-11-24 23:57:01,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-24 23:57:01,060 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:01,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:57:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-24 23:57:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-11-24 23:57:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 23:57:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-24 23:57:01,071 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2023-11-24 23:57:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:01,071 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-24 23:57:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:57:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-24 23:57:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:57:01,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:01,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:57:01,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:57:01,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:01,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -428559622, now seen corresponding path program 1 times [2023-11-24 23:57:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:01,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817974783] [2023-11-24 23:57:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:57:01,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817974783] [2023-11-24 23:57:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817974783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597665204] [2023-11-24 23:57:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:01,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:01,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:01,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:57:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:01,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-24 23:57:01,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:01,671 INFO L378 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 11 treesize of output 7 [2023-11-24 23:57:01,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-24 23:57:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:02,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:57:03,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2023-11-24 23:57:03,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:57:03,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 245 [2023-11-24 23:57:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597665204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:57:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855706522] [2023-11-24 23:57:03,364 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-24 23:57:03,364 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:57:03,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:57:03,365 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:57:03,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:57:04,041 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-11-24 23:57:04,762 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:57:09,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '413#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_#t~mem4#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_6| Int)) (and (= (mod |v_ULTIMATE.start_main_#t~mem4#1_BEFORE_CALL_2| 4294967296) 0) (exists ((|v_ULTIMATE.start_main_~index~0#1_49| Int)) (and (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_49| 4294967296)) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_49|))) (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_6| 1) (= |v_ULTIMATE.start_main_#t~mem4#1_BEFORE_CALL_2| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 4)) (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_6| 0) (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 0) 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7| Int)) (and (= |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_7| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) 0)) (exists ((|v_ULTIMATE.start_main_~index~0#1_49| Int)) (and (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_49| 4294967296)) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_49|))) (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_7| 0) (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_7| 0) (not (= (mod |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_7| 4294967296) 0))))))' at error location [2023-11-24 23:57:09,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:57:09,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:57:09,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 15] total 29 [2023-11-24 23:57:09,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991704776] [2023-11-24 23:57:09,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:57:09,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 23:57:09,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 23:57:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1287, Unknown=1, NotChecked=0, Total=1482 [2023-11-24 23:57:09,818 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 29 states, 25 states have (on average 1.76) internal successors, (44), 26 states have internal predecessors, (44), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 23:57:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:11,175 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2023-11-24 23:57:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:57:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.76) internal successors, (44), 26 states have internal predecessors, (44), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-11-24 23:57:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:11,177 INFO L225 Difference]: With dead ends: 71 [2023-11-24 23:57:11,177 INFO L226 Difference]: Without dead ends: 47 [2023-11-24 23:57:11,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=342, Invalid=2107, Unknown=1, NotChecked=0, Total=2450 [2023-11-24 23:57:11,181 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:11,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 74 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:57:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-24 23:57:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-11-24 23:57:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:57:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-24 23:57:11,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2023-11-24 23:57:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:11,197 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-24 23:57:11,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.76) internal successors, (44), 26 states have internal predecessors, (44), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 23:57:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-24 23:57:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:57:11,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:11,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:57:11,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:57:11,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:11,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:11,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:11,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2060334989, now seen corresponding path program 1 times [2023-11-24 23:57:11,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:11,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126117758] [2023-11-24 23:57:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:11,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:57:11,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126117758] [2023-11-24 23:57:11,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126117758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778689703] [2023-11-24 23:57:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:11,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:11,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6df83be-ae38-43ac-aa3a-aca219bd2b5e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:57:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:11,758 WARN L260 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-24 23:57:11,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:11,772 INFO L378 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 11 treesize of output 7 [2023-11-24 23:57:11,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-24 23:57:11,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:57:11,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-24 23:57:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:57:12,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:57:26,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 189 [2023-11-24 23:57:26,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:57:26,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1617 treesize of output 1573 [2023-11-24 23:57:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:57:27,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778689703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:57:27,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38945278] [2023-11-24 23:57:27,229 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:57:27,230 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:57:27,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:57:27,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:57:27,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:57:27,998 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 85 for LOIs [2023-11-24 23:57:28,169 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:57:38,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '803#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| 2) 0)) (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26|) (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| 4294967296) 999) (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_26|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| 4294967296) 4)) 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_29| Int)) (and (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_29| 0) (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 2) 0) (or (and (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 0) (exists ((|v_ULTIMATE.start_main_~index~0#1_65| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_65| 4294967296)) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_29|) (<= 1 |v_ULTIMATE.start_main_~index~0#1_65|)))) (and (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29|) (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 4294967296) 999))) (not (= (mod |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_19| 4294967296) 0)) (= |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_19| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_29|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 4294967296) 4)))))))' at error location [2023-11-24 23:57:38,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:57:38,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:57:38,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 22] total 40 [2023-11-24 23:57:38,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760234609] [2023-11-24 23:57:38,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:57:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-24 23:57:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:38,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-24 23:57:38,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2236, Unknown=6, NotChecked=0, Total=2550 [2023-11-24 23:57:38,253 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 40 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 37 states have internal predecessors, (59), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6)