./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:16:21,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:16:21,780 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:16:21,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:16:21,785 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:16:21,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:16:21,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:16:21,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:16:21,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:16:21,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:16:21,840 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:16:21,840 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:16:21,841 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:16:21,842 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:16:21,843 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:16:21,843 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:16:21,844 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:16:21,844 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:16:21,845 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:16:21,845 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:16:21,846 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:16:21,846 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:16:21,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:16:21,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:16:21,859 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:16:21,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:16:21,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:16:21,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:16:21,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:16:21,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:16:21,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:16:21,863 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:16:21,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:16:21,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:16:21,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:16:21,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:16:21,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:16:21,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:16:21,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:16:21,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:16:21,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:16:21,867 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:16:21,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:16:21,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:16:21,869 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:16:21,869 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:16:21,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:16:21,870 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_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 [2023-11-24 23:16:22,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:16:22,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:16:22,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:16:22,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:16:22,222 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:16:22,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2023-11-24 23:16:25,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:16:25,586 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:16:25,586 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2023-11-24 23:16:25,593 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/data/d81dddae2/35c660be99ef43ffbd70c94296fb7e17/FLAG6d0d8d766 [2023-11-24 23:16:25,607 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/data/d81dddae2/35c660be99ef43ffbd70c94296fb7e17 [2023-11-24 23:16:25,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:16:25,611 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:16:25,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:16:25,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:16:25,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:16:25,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d065799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25, skipping insertion in model container [2023-11-24 23:16:25,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,646 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:16:25,804 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_c58219d4-dfb4-45e4-9a7c-7711ec755073/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2023-11-24 23:16:25,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:16:25,832 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:16:25,846 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_c58219d4-dfb4-45e4-9a7c-7711ec755073/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2023-11-24 23:16:25,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:16:25,869 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:16:25,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25 WrapperNode [2023-11-24 23:16:25,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:16:25,871 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:16:25,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:16:25,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:16:25,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,906 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2023-11-24 23:16:25,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:16:25,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:16:25,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:16:25,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:16:25,916 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,918 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,918 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:16:25,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:16:25,936 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:16:25,936 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:16:25,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (1/1) ... [2023-11-24 23:16:25,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:16:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:25,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:16:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:16:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:16:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:16:26,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:16:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:16:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:16:26,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:16:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:16:26,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:16:26,079 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:16:26,081 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:16:26,237 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:16:26,285 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:16:26,285 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:16:26,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:16:26 BoogieIcfgContainer [2023-11-24 23:16:26,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:16:26,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:16:26,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:16:26,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:16:26,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:16:25" (1/3) ... [2023-11-24 23:16:26,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3cd581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:16:26, skipping insertion in model container [2023-11-24 23:16:26,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:25" (2/3) ... [2023-11-24 23:16:26,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3cd581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:16:26, skipping insertion in model container [2023-11-24 23:16:26,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:16:26" (3/3) ... [2023-11-24 23:16:26,297 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2023-11-24 23:16:26,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:16:26,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:16:26,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:16:26,378 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;@182e586d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:16:26,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:16:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:16:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:16:26,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:26,393 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:26,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:26,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2023-11-24 23:16:26,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:26,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372199292] [2023-11-24 23:16:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:26,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372199292] [2023-11-24 23:16:26,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 23:16:26,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352266123] [2023-11-24 23:16:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:26,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:26,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:26,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:26,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:16:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:26,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 23:16:26,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:16:26,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:16:26,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352266123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:26,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:26,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:16:26,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813266440] [2023-11-24 23:16:26,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:26,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:16:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:16:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:16:26,749 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 23:16:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:26,797 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2023-11-24 23:16:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:16:26,800 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-11-24 23:16:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:26,807 INFO L225 Difference]: With dead ends: 35 [2023-11-24 23:16:26,808 INFO L226 Difference]: Without dead ends: 21 [2023-11-24 23:16:26,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:16:26,815 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:26,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:16:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-24 23:16:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-24 23:16:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 23:16:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-24 23:16:26,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2023-11-24 23:16:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:26,857 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-24 23:16:26,858 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 23:16:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-24 23:16:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:16:26,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:26,860 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:26,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:16:27,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:27,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:27,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2023-11-24 23:16:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:27,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351949953] [2023-11-24 23:16:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:27,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:16:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215734630] [2023-11-24 23:16:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:27,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:27,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:16:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:27,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 23:16:27,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:16:27,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:16:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:16:27,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351949953] [2023-11-24 23:16:27,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:16:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215734630] [2023-11-24 23:16:27,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215734630] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:16:27,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:16:27,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-24 23:16:27,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818024549] [2023-11-24 23:16:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:27,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:16:27,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:16:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:16:27,691 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 23:16:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:28,812 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-11-24 23:16:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:16:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2023-11-24 23:16:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:28,815 INFO L225 Difference]: With dead ends: 33 [2023-11-24 23:16:28,815 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 23:16:28,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:16:28,817 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:28,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 23:16:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 23:16:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-24 23:16:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:16:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-24 23:16:28,830 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2023-11-24 23:16:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:28,831 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-24 23:16:28,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 23:16:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-24 23:16:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:16:28,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:28,833 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:28,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:16:29,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:29,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:29,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2023-11-24 23:16:29,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:29,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632604384] [2023-11-24 23:16:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:29,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:29,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:16:29,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167678592] [2023-11-24 23:16:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:29,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:29,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:29,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:16:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:29,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 23:16:29,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:16:29,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:16:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:16:29,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:29,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632604384] [2023-11-24 23:16:29,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:16:29,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167678592] [2023-11-24 23:16:29,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167678592] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:16:29,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:16:29,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-24 23:16:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503322491] [2023-11-24 23:16:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:16:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:16:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:16:29,695 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 23:16:31,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-24 23:16:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:32,159 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-24 23:16:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:16:32,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-24 23:16:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:32,161 INFO L225 Difference]: With dead ends: 40 [2023-11-24 23:16:32,161 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 23:16:32,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:16:32,163 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:32,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-24 23:16:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 23:16:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-11-24 23:16:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:16:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-24 23:16:32,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2023-11-24 23:16:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:32,182 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-24 23:16:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-24 23:16:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-24 23:16:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:16:32,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:32,184 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:32,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:16:32,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:32,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:32,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2136592426, now seen corresponding path program 1 times [2023-11-24 23:16:32,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:32,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628660837] [2023-11-24 23:16:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:32,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:16:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207841755] [2023-11-24 23:16:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:32,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:32,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:16:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:32,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:16:32,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:16:32,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:16:32,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:32,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628660837] [2023-11-24 23:16:32,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:16:32,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207841755] [2023-11-24 23:16:32,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207841755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:32,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:32,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:16:32,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104591722] [2023-11-24 23:16:32,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:32,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:16:32,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:32,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:16:32,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:16:32,506 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:16:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:32,538 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-11-24 23:16:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:16:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-11-24 23:16:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:32,540 INFO L225 Difference]: With dead ends: 43 [2023-11-24 23:16:32,540 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 23:16:32,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:16:32,542 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:32,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:16:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 23:16:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-24 23:16:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:16:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-24 23:16:32,554 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 29 [2023-11-24 23:16:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:32,555 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-24 23:16:32,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:16:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-24 23:16:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:16:32,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:32,557 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:32,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:16:32,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:32,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:32,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1183920689, now seen corresponding path program 1 times [2023-11-24 23:16:32,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:32,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536422195] [2023-11-24 23:16:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:32,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:32,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:16:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450674106] [2023-11-24 23:16:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:32,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:32,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:32,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:32,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58219d4-dfb4-45e4-9a7c-7711ec755073/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:16:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:32,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-24 23:16:32,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 23:16:33,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:16:51,361 WARN L293 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-24 23:17:08,467 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse3 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse2 (mod (+ (* 2 .cse1 |c_ULTIMATE.start_main_~q~0#1|) .cse1) 4294967296))) (< (+ 4294967295 .cse0 (* 4294967296 (div (+ (- 1) (* (- 1) .cse1) (* (- 1) .cse0) .cse2 |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) .cse1) (+ .cse2 |c_ULTIMATE.start_main_~r~0#1|))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (< .cse3 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (< (* 2 .cse1) (+ .cse3 1)))) is different from true [2023-11-24 23:17:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2023-11-24 23:17:21,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:21,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536422195] [2023-11-24 23:17:21,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:17:21,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450674106] [2023-11-24 23:17:21,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450674106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:17:21,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484835718] [2023-11-24 23:17:21,764 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-24 23:17:21,765 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:17:21,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:17:21,774 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:17:21,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:17:22,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-11-24 23:17:22,726 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-24 23:17:22,728 INFO L180 IcfgInterpreter]: Interpretation finished