./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ --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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:22:57,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:22:57,282 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:22:57,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:22:57,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:22:57,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:22:57,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:22:57,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:22:57,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:22:57,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:22:57,335 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:22:57,336 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:22:57,336 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:22:57,338 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:22:57,339 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:22:57,339 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:22:57,339 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:22:57,340 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:22:57,340 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:22:57,341 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:22:57,341 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:22:57,342 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:22:57,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:22:57,343 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:22:57,344 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:22:57,344 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:22:57,345 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:22:57,345 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:22:57,345 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:22:57,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:22:57,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:22:57,347 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:22:57,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:22:57,348 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:22:57,348 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:22:57,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:22:57,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:22:57,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:22:57,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:22:57,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:22:57,363 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:22:57,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:22:57,364 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:22:57,364 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:22:57,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:22:57,365 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_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f [2023-11-19 05:22:57,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:22:57,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:22:57,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:22:57,706 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:22:57,707 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:22:57,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2023-11-19 05:23:00,751 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:23:00,990 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:23:00,990 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2023-11-19 05:23:00,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/data/1ec4774e4/21fbbebb34474d2588d87e9451565d7f/FLAG3eddd0109 [2023-11-19 05:23:01,014 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/data/1ec4774e4/21fbbebb34474d2588d87e9451565d7f [2023-11-19 05:23:01,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:23:01,019 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:23:01,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:23:01,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:23:01,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:23:01,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6ccda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01, skipping insertion in model container [2023-11-19 05:23:01,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,054 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:23:01,241 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_1d809cd3-f020-49b1-bf32-aca53d36e5ff/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2023-11-19 05:23:01,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:23:01,289 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:23:01,306 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_1d809cd3-f020-49b1-bf32-aca53d36e5ff/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2023-11-19 05:23:01,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:23:01,342 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:23:01,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01 WrapperNode [2023-11-19 05:23:01,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:23:01,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:23:01,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:23:01,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:23:01,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,384 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2023-11-19 05:23:01,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:23:01,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:23:01,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:23:01,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:23:01,392 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,396 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,408 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:23:01,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:23:01,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:23:01,413 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:23:01,414 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (1/1) ... [2023-11-19 05:23:01,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:23:01,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:01,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:23:01,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:23:01,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:23:01,497 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2023-11-19 05:23:01,497 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2023-11-19 05:23:01,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:23:01,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:23:01,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:23:01,497 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2023-11-19 05:23:01,498 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2023-11-19 05:23:01,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:23:01,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:23:01,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:23:01,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:23:01,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:23:01,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:23:01,635 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:23:01,640 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:23:01,964 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:23:02,032 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:23:02,033 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:23:02,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:23:02 BoogieIcfgContainer [2023-11-19 05:23:02,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:23:02,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:23:02,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:23:02,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:23:02,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:23:01" (1/3) ... [2023-11-19 05:23:02,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df5820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:23:02, skipping insertion in model container [2023-11-19 05:23:02,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:01" (2/3) ... [2023-11-19 05:23:02,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df5820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:23:02, skipping insertion in model container [2023-11-19 05:23:02,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:23:02" (3/3) ... [2023-11-19 05:23:02,059 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2023-11-19 05:23:02,080 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:23:02,080 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:23:02,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:23:02,159 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;@5e01c366, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:23:02,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:23:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 05:23:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 05:23:02,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:02,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:02,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:02,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1243235035, now seen corresponding path program 1 times [2023-11-19 05:23:02,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:02,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006316549] [2023-11-19 05:23:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:02,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:02,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006316549] [2023-11-19 05:23:02,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:23:02,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792443207] [2023-11-19 05:23:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:02,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:02,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:02,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:23:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:02,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 05:23:02,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:02,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:23:02,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792443207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:23:02,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:23:02,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:23:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894997209] [2023-11-19 05:23:02,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:23:02,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:23:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:23:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:23:02,748 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:23:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:02,798 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2023-11-19 05:23:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:23:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-19 05:23:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:02,810 INFO L225 Difference]: With dead ends: 48 [2023-11-19 05:23:02,810 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 05:23:02,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:23:02,821 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:02,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:23:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 05:23:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 05:23:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:23:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-19 05:23:02,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2023-11-19 05:23:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:02,877 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-19 05:23:02,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:23:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-19 05:23:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:23:02,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:02,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:02,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:23:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 05:23:03,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:03,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1037453188, now seen corresponding path program 1 times [2023-11-19 05:23:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:03,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277101727] [2023-11-19 05:23:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:03,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:23:03,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479546131] [2023-11-19 05:23:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:03,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:03,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:03,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:03,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:23:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:03,391 WARN L260 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-19 05:23:03,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:03,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,574 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,575 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,584 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:03,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:03,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 33 [2023-11-19 05:23:03,701 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-11-19 05:23:03,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2023-11-19 05:23:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,783 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,784 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,790 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:03,799 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:03,805 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:04,744 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 05:23:04,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 28 [2023-11-19 05:23:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:04,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:23:04,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277101727] [2023-11-19 05:23:04,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:23:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479546131] [2023-11-19 05:23:04,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479546131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:23:04,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:23:04,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 05:23:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939459192] [2023-11-19 05:23:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:23:04,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:23:04,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:23:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:23:04,862 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:23:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:06,175 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-19 05:23:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:23:06,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 05:23:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:06,179 INFO L225 Difference]: With dead ends: 45 [2023-11-19 05:23:06,179 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 05:23:06,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:23:06,182 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:06,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 75 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:23:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 05:23:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-11-19 05:23:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-19 05:23:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-19 05:23:06,200 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2023-11-19 05:23:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:06,200 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-19 05:23:06,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:23:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-19 05:23:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:23:06,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:06,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:06,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:23:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:06,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:06,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1600190275, now seen corresponding path program 1 times [2023-11-19 05:23:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:06,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577119204] [2023-11-19 05:23:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:06,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:23:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574650356] [2023-11-19 05:23:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:06,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:06,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:06,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:06,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:23:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:06,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-19 05:23:06,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:06,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2023-11-19 05:23:06,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-11-19 05:23:06,662 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-11-19 05:23:06,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2023-11-19 05:23:06,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-19 05:23:06,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-19 05:23:06,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 38 [2023-11-19 05:23:07,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-19 05:23:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:23:07,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:23:07,690 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_150 (Array Int Int)) (|func_to_recursive_line_37_to_44_0_#t~mem2| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| v_ArrVal_150))) (= (mod (+ (* |func_to_recursive_line_37_to_44_0_#t~mem2| (select (select .cse0 |c_ULTIMATE.start_main_~#q~0#1.base|) |c_ULTIMATE.start_main_~#q~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_main_~#r~0#1.base|) |c_ULTIMATE.start_main_~#r~0#1.offset|)) 4294967296) (mod (select (select .cse0 |c_ULTIMATE.start_main_~#A~0#1.base|) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) is different from false [2023-11-19 05:23:07,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577119204] [2023-11-19 05:23:07,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:23:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574650356] [2023-11-19 05:23:07,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574650356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:23:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860796335] [2023-11-19 05:23:07,746 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 05:23:07,747 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:23:07,752 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:23:07,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:23:07,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-19 05:23:07,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961231449] [2023-11-19 05:23:07,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 05:23:07,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:23:07,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:23:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2023-11-19 05:23:07,760 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:08,481 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-11-19 05:23:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:23:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-19 05:23:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:08,483 INFO L225 Difference]: With dead ends: 59 [2023-11-19 05:23:08,483 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 05:23:08,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=505, Unknown=1, NotChecked=46, Total=650 [2023-11-19 05:23:08,485 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:08,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 76 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:23:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 05:23:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-11-19 05:23:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-19 05:23:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-11-19 05:23:08,512 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 20 [2023-11-19 05:23:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:08,512 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-11-19 05:23:08,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-11-19 05:23:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 05:23:08,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:08,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:08,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:23:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:08,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:08,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2125289930, now seen corresponding path program 2 times [2023-11-19 05:23:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:08,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142244037] [2023-11-19 05:23:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:08,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:23:08,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064234657] [2023-11-19 05:23:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:23:08,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:08,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:08,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:23:09,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:23:09,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:23:09,195 WARN L260 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-19 05:23:09,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,331 INFO L349 Elim1Store]: treesize reduction 78, result has 39.5 percent of original size [2023-11-19 05:23:09,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 266 treesize of output 128 [2023-11-19 05:23:09,391 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-11-19 05:23:09,392 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 452 treesize of output 436 [2023-11-19 05:23:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:09,553 INFO L349 Elim1Store]: treesize reduction 97, result has 19.8 percent of original size [2023-11-19 05:23:09,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 218 treesize of output 278 [2023-11-19 05:23:10,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:10,296 INFO L349 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2023-11-19 05:23:10,297 INFO L378 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 34 [2023-11-19 05:23:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:11,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:11,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:11,647 INFO L349 Elim1Store]: treesize reduction 52, result has 25.7 percent of original size [2023-11-19 05:23:11,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 1452 treesize of output 1338 [2023-11-19 05:23:11,741 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 452 treesize of output 450 [2023-11-19 05:23:11,784 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 450 treesize of output 448 [2023-11-19 05:23:11,815 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 448 treesize of output 446 [2023-11-19 05:23:11,853 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 446 treesize of output 444 [2023-11-19 05:23:11,883 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 444 treesize of output 442 [2023-11-19 05:23:11,913 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 442 treesize of output 440 [2023-11-19 05:23:11,943 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 440 treesize of output 438 [2023-11-19 05:23:11,973 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 438 treesize of output 436 [2023-11-19 05:23:12,004 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 436 treesize of output 434 [2023-11-19 05:23:12,035 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 434 treesize of output 432 [2023-11-19 05:23:12,066 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 432 treesize of output 430 [2023-11-19 05:23:12,096 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 430 treesize of output 428 [2023-11-19 05:23:12,126 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 428 treesize of output 426 [2023-11-19 05:23:12,164 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 426 treesize of output 424 [2023-11-19 05:23:12,194 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 424 treesize of output 422 [2023-11-19 05:23:12,223 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 422 treesize of output 420 [2023-11-19 05:23:12,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:23:12,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2023-11-19 05:23:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:23:12,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:23:13,293 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (|func_to_recursive_line_37_to_44_0_#t~mem2| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| v_ArrVal_216))) (= (mod (+ (select (select .cse0 |c_ULTIMATE.start_main_~#r~0#1.base|) |c_ULTIMATE.start_main_~#r~0#1.offset|) (* |func_to_recursive_line_37_to_44_0_#t~mem2| (select (select .cse0 |c_ULTIMATE.start_main_~#q~0#1.base|) |c_ULTIMATE.start_main_~#q~0#1.offset|))) 4294967296) (mod (select (select .cse0 |c_ULTIMATE.start_main_~#A~0#1.base|) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) is different from false [2023-11-19 05:23:13,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142244037] [2023-11-19 05:23:13,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:23:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064234657] [2023-11-19 05:23:13,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064234657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:23:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448948872] [2023-11-19 05:23:13,298 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 05:23:13,298 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:23:13,299 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:23:13,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:23:13,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-19 05:23:13,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644897095] [2023-11-19 05:23:13,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 05:23:13,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:23:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:23:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=397, Unknown=1, NotChecked=40, Total=506 [2023-11-19 05:23:13,302 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:23:13,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:13,910 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-11-19 05:23:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:23:13,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-11-19 05:23:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:13,912 INFO L225 Difference]: With dead ends: 61 [2023-11-19 05:23:13,912 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 05:23:13,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=595, Unknown=1, NotChecked=50, Total=756 [2023-11-19 05:23:13,914 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:13,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 70 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 207 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:23:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 05:23:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2023-11-19 05:23:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-19 05:23:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-19 05:23:13,930 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2023-11-19 05:23:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:13,930 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-19 05:23:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:23:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-19 05:23:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 05:23:13,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:13,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:13,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:23:14,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:14,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:14,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash -292759884, now seen corresponding path program 1 times [2023-11-19 05:23:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:14,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775178356] [2023-11-19 05:23:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:14,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:23:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326414629] [2023-11-19 05:23:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:14,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:14,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:14,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:23:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:14,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-19 05:23:14,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:14,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 22 [2023-11-19 05:23:14,486 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-19 05:23:14,486 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 40 treesize of output 34 [2023-11-19 05:23:14,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,530 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,548 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 22 [2023-11-19 05:23:14,593 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:23:14,593 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 116 treesize of output 112 [2023-11-19 05:23:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 26 [2023-11-19 05:23:14,650 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:23:14,650 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 38 treesize of output 34 [2023-11-19 05:23:14,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,678 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,767 INFO L349 Elim1Store]: treesize reduction 458, result has 0.2 percent of original size [2023-11-19 05:23:14,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1402 treesize of output 255 [2023-11-19 05:23:14,838 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-19 05:23:14,838 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 134 treesize of output 126 [2023-11-19 05:23:14,959 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,960 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:23:14,964 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:23:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:14,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 22 [2023-11-19 05:23:15,032 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:23:15,032 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 70 treesize of output 64 [2023-11-19 05:23:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:15,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:23:15,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:15,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775178356] [2023-11-19 05:23:15,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:23:15,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326414629] [2023-11-19 05:23:15,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326414629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:23:15,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:23:15,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:23:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963455138] [2023-11-19 05:23:15,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:23:15,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:23:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:23:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:23:15,309 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:15,709 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2023-11-19 05:23:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:23:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-19 05:23:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:15,711 INFO L225 Difference]: With dead ends: 83 [2023-11-19 05:23:15,711 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 05:23:15,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:23:15,713 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:15,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 138 Invalid, 3 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:23:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 05:23:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-11-19 05:23:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 05:23:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-19 05:23:15,738 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 24 [2023-11-19 05:23:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:15,739 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-19 05:23:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-19 05:23:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 05:23:15,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:15,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:15,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:23:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:15,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:15,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:15,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1998724610, now seen corresponding path program 1 times [2023-11-19 05:23:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:15,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240169964] [2023-11-19 05:23:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:15,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:15,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:23:15,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756009587] [2023-11-19 05:23:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:15,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:15,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:15,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:15,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d809cd3-f020-49b1-bf32-aca53d36e5ff/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:23:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:16,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-19 05:23:16,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,341 INFO L349 Elim1Store]: treesize reduction 102, result has 39.6 percent of original size [2023-11-19 05:23:16,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 266 treesize of output 144 [2023-11-19 05:23:16,400 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-19 05:23:16,401 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 146 treesize of output 151 [2023-11-19 05:23:16,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:16,500 INFO L349 Elim1Store]: treesize reduction 76, result has 10.6 percent of original size [2023-11-19 05:23:16,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 101 treesize of output 124 [2023-11-19 05:23:16,680 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 5 treesize of output 3 [2023-11-19 05:23:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:18,777 INFO L349 Elim1Store]: treesize reduction 118, result has 19.7 percent of original size [2023-11-19 05:23:18,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 1151 treesize of output 1158 [2023-11-19 05:23:18,861 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 460 treesize of output 452 [2023-11-19 05:23:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:19,412 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2023-11-19 05:23:19,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 47 [2023-11-19 05:23:19,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:23:19,666 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 26 treesize of output 28 [2023-11-19 05:23:20,922 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#q~0#1.offset| 0) (let ((.cse25 (select |c_#memory_int| |c_ULTIMATE.start_main_~#r~0#1.base|)) (.cse24 (select |c_#memory_int| |c_ULTIMATE.start_main_~#q~0#1.base|))) (let ((.cse0 (= (select .cse24 0) 0)) (.cse2 (select .cse25 0)) (.cse1 (= |c_ULTIMATE.start_main_~#A~0#1.base| |c_ULTIMATE.start_main_~#q~0#1.base|))) (or (and .cse0 .cse1 (= .cse2 0) (or (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#B~0#1.offset| Int) (v_DerPreprocessor_15 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse3 (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_13) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_15))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#A~0#1.base|))) (and (= (select (select .cse3 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0) (= (select v_DerPreprocessor_15 0) (select .cse4 0)) (= v_DerPreprocessor_12 .cse4) (= (select (select .cse3 |ULTIMATE.start_main_~#b~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) 1))))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#B~0#1.offset| Int) (v_DerPreprocessor_15 (Array Int Int)) (|ULTIMATE.start_main_~#B~0#1.base| Int) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse5 (store (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |ULTIMATE.start_main_~#B~0#1.base| v_DerPreprocessor_13) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_15))) (let ((.cse6 (select .cse5 |ULTIMATE.start_main_~#B~0#1.base|))) (and (not (= |ULTIMATE.start_main_~#B~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (= (select (select .cse5 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0) (= v_DerPreprocessor_12 (select .cse5 |c_ULTIMATE.start_main_~#A~0#1.base|)) (= (select .cse6 |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) 1) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#A~0#1.base|)) (= v_DerPreprocessor_13 .cse6))))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#B~0#1.offset| Int) (v_DerPreprocessor_15 (Array Int Int)) (|ULTIMATE.start_main_~#B~0#1.base| Int) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse7 (store (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |ULTIMATE.start_main_~#B~0#1.base| v_DerPreprocessor_13) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_15))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#A~0#1.base|)) (.cse9 (select .cse7 |ULTIMATE.start_main_~#B~0#1.base|))) (and (not (= |ULTIMATE.start_main_~#B~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (= (select (select .cse7 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0) (= v_DerPreprocessor_12 .cse8) (= (select .cse9 |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= (select v_DerPreprocessor_15 0) (select .cse8 0)) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#A~0#1.base|)) (= v_DerPreprocessor_13 .cse9))))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse11 (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_13))) (let ((.cse10 (select .cse11 |c_ULTIMATE.start_main_~#A~0#1.base|))) (and (= (select .cse10 0) (select v_DerPreprocessor_13 0)) (= .cse10 v_DerPreprocessor_12) (= (select (select .cse11 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0))))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#B~0#1.offset| Int) (v_DerPreprocessor_15 (Array Int Int)) (|ULTIMATE.start_main_~#B~0#1.base| Int) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse12 (store (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |ULTIMATE.start_main_~#B~0#1.base| v_DerPreprocessor_13) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_15))) (let ((.cse13 (select .cse12 |c_ULTIMATE.start_main_~#A~0#1.base|)) (.cse14 (select .cse12 |ULTIMATE.start_main_~#B~0#1.base|))) (and (= (select (select .cse12 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0) (= v_DerPreprocessor_12 .cse13) (= (select .cse14 |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= v_DerPreprocessor_11 (select .cse12 |ULTIMATE.start_main_~#b~0#1.base|)) (= (select v_DerPreprocessor_15 0) (select .cse13 0)) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#A~0#1.base|)) (= v_DerPreprocessor_13 .cse14))))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#B~0#1.offset| Int) (v_DerPreprocessor_15 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse15 (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_13) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_15))) (and (= (select (select .cse15 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0) (= v_DerPreprocessor_12 (select .cse15 |c_ULTIMATE.start_main_~#A~0#1.base|)) (= (select (select .cse15 |ULTIMATE.start_main_~#b~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) 1)))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse16 (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_13))) (and (= (select v_DerPreprocessor_13 0) 1) (= (select .cse16 |c_ULTIMATE.start_main_~#A~0#1.base|) v_DerPreprocessor_12) (= (select (select .cse16 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0)))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse17 (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_13))) (and (= (select .cse17 |c_ULTIMATE.start_main_~#A~0#1.base|) v_DerPreprocessor_12) (= (select (select .cse17 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0)))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#b~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#B~0#1.offset| Int) (v_DerPreprocessor_15 (Array Int Int)) (|ULTIMATE.start_main_~#B~0#1.base| Int) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_12 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse18 (store (store (store (store (store |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_11) |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_12) |ULTIMATE.start_main_~#B~0#1.base| v_DerPreprocessor_13) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_14) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_15))) (let ((.cse19 (select .cse18 |ULTIMATE.start_main_~#B~0#1.base|))) (and (= (select (select .cse18 |c_ULTIMATE.start_main_~#q~0#1.base|) 0) 0) (= v_DerPreprocessor_12 (select .cse18 |c_ULTIMATE.start_main_~#A~0#1.base|)) (= (select .cse19 |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|) 1) (= v_DerPreprocessor_11 (select .cse18 |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#A~0#1.base|)) (= v_DerPreprocessor_13 .cse19))))) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))))) (and (let ((.cse23 (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|))) (let ((.cse20 (= .cse2 (select .cse23 0))) (.cse21 (not (= |c_ULTIMATE.start_main_~#q~0#1.base| |c_ULTIMATE.start_main_~#r~0#1.base|)))) (or (and .cse0 .cse20 .cse21 (exists ((v_DerPreprocessor_26 (Array Int Int)) (|ULTIMATE.start_main_~#b~0#1.base| Int) (v_DerPreprocessor_28 (Array Int Int)) (v_DerPreprocessor_29 (Array Int Int))) (let ((.cse22 (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_26) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_28) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_29) |ULTIMATE.start_main_~#b~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base|)))) (and (= (select .cse22 |c_ULTIMATE.start_main_~#A~0#1.base|) .cse23) (not (= |c_ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (= (select .cse22 |c_ULTIMATE.start_main_~#q~0#1.base|) .cse24) (= .cse25 (select .cse22 |c_ULTIMATE.start_main_~#r~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))))) (and .cse0 .cse20 .cse21 (exists ((v_DerPreprocessor_21 (Array Int Int)) (|ULTIMATE.start_main_~#b~0#1.base| Int) (v_DerPreprocessor_23 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int))) (let ((.cse26 (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_21) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_23) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_24) |ULTIMATE.start_main_~#b~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base|)))) (and (= (select .cse26 |c_ULTIMATE.start_main_~#q~0#1.base|) .cse24) (not (= |c_ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (= .cse25 (select .cse26 |c_ULTIMATE.start_main_~#r~0#1.base|)) (= (select .cse26 |c_ULTIMATE.start_main_~#A~0#1.base|) .cse23) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)))))) (and .cse0 (exists ((v_DerPreprocessor_19 (Array Int Int)) (|ULTIMATE.start_main_~#b~0#1.base| Int) (v_DerPreprocessor_16 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse27 (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base| v_DerPreprocessor_16) |c_ULTIMATE.start_main_~#q~0#1.base| v_DerPreprocessor_18) |c_ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_19) |ULTIMATE.start_main_~#b~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#b~0#1.base|)))) (and (not (= |c_ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (= (select .cse27 |c_ULTIMATE.start_main_~#A~0#1.base|) .cse23) (= (select .cse27 |c_ULTIMATE.start_main_~#q~0#1.base|) .cse24) (= .cse25 (select .cse27 |c_ULTIMATE.start_main_~#r~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#r~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |ULTIMATE.start_main_~#b~0#1.base|))))) .cse20 .cse21) (and .cse0 .cse20 .cse21 (or (exists ((v_prenex_167 Int) (|ULTIMATE.start_main_~#B~0#1.base| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) v_prenex_167) 1) (not (= v_prenex_167 0)) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#A~0#1.base|)))) (exists ((v_prenex_167 Int) (|ULTIMATE.start_main_~#B~0#1.base| Int)) (and (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#r~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) v_prenex_167) 1) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#q~0#1.base|)) (not (= |ULTIMATE.start_main_~#B~0#1.base| |c_ULTIMATE.start_main_~#A~0#1.base|))))))))) (not .cse1))))) (= |c_ULTIMATE.start_main_~#r~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~#A~0#1.base| |c_ULTIMATE.start_main_~#r~0#1.base|)) (= |c_ULTIMATE.start_main_~#A~0#1.offset| 0)) is different from true [2023-11-19 05:23:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:23:25,547 INFO L349 Elim1Store]: treesize reduction 8, result has 98.5 percent of original size [2023-11-19 05:23:25,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 65 case distinctions, treesize of input 29259 treesize of output 29599 [2023-11-19 05:23:25,932 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 984 treesize of output 982 [2023-11-19 05:23:26,096 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 982 treesize of output 980 [2023-11-19 05:23:26,261 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 980 treesize of output 976 [2023-11-19 05:23:26,441 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 976 treesize of output 974 [2023-11-19 05:23:26,609 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 974 treesize of output 972 [2023-11-19 05:23:26,801 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 972 treesize of output 970 [2023-11-19 05:23:26,958 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 970 treesize of output 966 [2023-11-19 05:23:27,747 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 5 treesize of output 3 [2023-11-19 05:23:27,816 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 5 treesize of output 3 [2023-11-19 05:23:27,892 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 5 treesize of output 3 [2023-11-19 05:23:27,940 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 5 treesize of output 3 [2023-11-19 05:23:30,635 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 23 treesize of output 17 [2023-11-19 05:23:30,639 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 11 treesize of output 7 [2023-11-19 05:23:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:30,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:23:30,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:30,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240169964] [2023-11-19 05:23:30,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:23:30,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756009587] [2023-11-19 05:23:30,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756009587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:23:30,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307683520] [2023-11-19 05:23:30,832 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-19 05:23:30,832 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:23:30,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:23:30,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:23:30,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:23:31,772 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_35_0 with input of size 102 for LOIs [2023-11-19 05:23:31,880 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_37_to_44_0 with input of size 95 for LOIs [2023-11-19 05:23:32,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 183 for LOIs [2023-11-19 05:23:33,036 INFO L180 IcfgInterpreter]: Interpretation finished