./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/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_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/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_cbaaa45d-7096-4aca-97a6-47cbd6150e53/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 f07dfd29134e87fb8840c55cea4fca74cbf39cfbb92d83a07db93f4706876200 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:53:33,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:53:33,959 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:53:33,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:53:33,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:53:33,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:53:34,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:53:34,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:53:34,002 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:53:34,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:53:34,004 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:53:34,005 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:53:34,005 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:53:34,006 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:53:34,007 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:53:34,008 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:53:34,008 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:53:34,009 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:53:34,010 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:53:34,011 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:53:34,011 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:53:34,012 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:53:34,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:53:34,014 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:53:34,015 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:53:34,015 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:53:34,016 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:53:34,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:53:34,017 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:53:34,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:53:34,018 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:53:34,019 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:53:34,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:53:34,020 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:53:34,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:53:34,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:53:34,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:34,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:53:34,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:53:34,024 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:53:34,025 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:53:34,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:53:34,026 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:53:34,027 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:53:34,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:53:34,028 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_cbaaa45d-7096-4aca-97a6-47cbd6150e53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f07dfd29134e87fb8840c55cea4fca74cbf39cfbb92d83a07db93f4706876200 [2023-11-19 04:53:34,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:53:34,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:53:34,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:53:34,360 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:53:34,360 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:53:34,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c [2023-11-19 04:53:38,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:53:38,346 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:53:38,347 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c [2023-11-19 04:53:38,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/data/7467e15d3/88d9b79f8fe24f17b227f0c242018c07/FLAGdd22fdfbf [2023-11-19 04:53:38,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/data/7467e15d3/88d9b79f8fe24f17b227f0c242018c07 [2023-11-19 04:53:38,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:53:38,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:53:38,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:38,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:53:38,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:53:38,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ea48f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38, skipping insertion in model container [2023-11-19 04:53:38,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,421 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:53:38,637 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_cbaaa45d-7096-4aca-97a6-47cbd6150e53/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c[537,550] [2023-11-19 04:53:38,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:38,691 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:53:38,709 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_cbaaa45d-7096-4aca-97a6-47cbd6150e53/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c[537,550] [2023-11-19 04:53:38,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:38,737 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:53:38,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38 WrapperNode [2023-11-19 04:53:38,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:38,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:38,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:53:38,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:53:38,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,782 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-11-19 04:53:38,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:38,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:53:38,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:53:38,785 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:53:38,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:53:38,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:53:38,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:53:38,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:53:38,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (1/1) ... [2023-11-19 04:53:38,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:38,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:53:38,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:53:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:53:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:53:38,915 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:53:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:53:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:53:38,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:53:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:53:38,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:53:38,993 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:53:38,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:53:39,208 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:53:39,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:53:39,267 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:53:39,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:39 BoogieIcfgContainer [2023-11-19 04:53:39,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:53:39,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:53:39,277 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:53:39,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:53:39,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:38" (1/3) ... [2023-11-19 04:53:39,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d07eff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:39, skipping insertion in model container [2023-11-19 04:53:39,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:38" (2/3) ... [2023-11-19 04:53:39,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d07eff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:39, skipping insertion in model container [2023-11-19 04:53:39,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:39" (3/3) ... [2023-11-19 04:53:39,298 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound50.c [2023-11-19 04:53:39,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:53:39,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:53:39,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:53:39,391 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;@d8d3710, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:53:39,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:53:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:53:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:53:39,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:39,409 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:39,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:39,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash 727522484, now seen corresponding path program 1 times [2023-11-19 04:53:39,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:39,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740326914] [2023-11-19 04:53:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:39,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:39,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740326914] [2023-11-19 04:53:39,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 04:53:39,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127322559] [2023-11-19 04:53:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:39,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:39,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:39,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:53:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:39,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 04:53:39,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 04:53:39,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:53:39,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127322559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:39,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:39,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:53:39,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185281423] [2023-11-19 04:53:39,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:53:39,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:39,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:53:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:53:39,966 INFO L87 Difference]: Start difference. First operand has 23 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:53:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:40,015 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2023-11-19 04:53:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:53:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2023-11-19 04:53:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:40,028 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:53:40,028 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 04:53:40,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 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 04:53:40,038 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:40,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:53:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 04:53:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 04:53:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 04:53:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-19 04:53:40,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 26 [2023-11-19 04:53:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:40,113 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-19 04:53:40,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:53:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-19 04:53:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:53:40,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:40,116 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:40,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:40,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 04:53:40,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:40,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash 671128121, now seen corresponding path program 1 times [2023-11-19 04:53:40,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:40,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049936994] [2023-11-19 04:53:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:40,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:40,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690584431] [2023-11-19 04:53:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:40,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:40,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:53:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:40,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 04:53:40,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 04:53:40,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:53:40,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049936994] [2023-11-19 04:53:40,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690584431] [2023-11-19 04:53:40,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690584431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:40,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:40,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:53:40,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042359237] [2023-11-19 04:53:40,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:40,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:53:40,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:53:40,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:53:40,802 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:53:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:40,984 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-19 04:53:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:53:40,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2023-11-19 04:53:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:40,988 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:53:40,988 INFO L226 Difference]: Without dead ends: 28 [2023-11-19 04:53:40,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:53:40,992 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:40,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:53:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-19 04:53:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-19 04:53:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:53:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-19 04:53:41,018 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 26 [2023-11-19 04:53:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:41,020 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-19 04:53:41,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:53:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-19 04:53:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 04:53:41,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:41,025 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:41,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:41,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:41,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:41,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1013354018, now seen corresponding path program 1 times [2023-11-19 04:53:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:41,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728458002] [2023-11-19 04:53:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:41,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:53:41,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102695498] [2023-11-19 04:53:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:41,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:41,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:41,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbaaa45d-7096-4aca-97a6-47cbd6150e53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:53:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:41,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:53:41,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 04:53:56,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 04:53:57,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728458002] [2023-11-19 04:53:57,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:53:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102695498] [2023-11-19 04:53:57,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102695498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282264814] [2023-11-19 04:53:57,958 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 04:53:57,958 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:57,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:57,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:57,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:54:00,017 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-19 04:54:00,079 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 04:54:00,081 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:54:36,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '559#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_11| Int)) (not (= (mod (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_11|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11|)) 4294967296) (* (mod (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_21| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_29|) 2147483648) 2)))))' at error location [2023-11-19 04:54:36,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:54:36,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:54:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2023-11-19 04:54:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308149745] [2023-11-19 04:54:36,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:54:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:54:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:54:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=490, Unknown=11, NotChecked=0, Total=600 [2023-11-19 04:54:36,102 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 04:54:39,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []