./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX --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 154556615f003714b5a49b3ebe7e74b2231be519e4b6364e10c3e255a1a8cfe1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:39,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:39,570 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:48:39,578 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:39,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:39,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:39,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:39,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:39,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:39,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:39,628 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:39,629 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:39,630 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:39,632 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:39,632 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:39,632 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:39,633 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:39,633 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:39,634 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:39,634 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:39,635 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:39,635 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:39,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:39,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:39,638 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:39,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:39,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:39,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:39,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:39,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:39,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:39,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:39,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:39,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:39,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:39,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:39,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:39,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:39,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:39,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:39,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:39,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:39,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:39,645 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:39,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:39,646 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_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 154556615f003714b5a49b3ebe7e74b2231be519e4b6364e10c3e255a1a8cfe1 [2023-11-12 00:48:39,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:39,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:39,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:39,997 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:39,997 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:40,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2023-11-12 00:48:43,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:43,346 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:43,347 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2023-11-12 00:48:43,360 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/data/55790d3a9/5a7ba6853c7a431dae9d7fcf33b573c7/FLAG52ae52ca4 [2023-11-12 00:48:43,676 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/data/55790d3a9/5a7ba6853c7a431dae9d7fcf33b573c7 [2023-11-12 00:48:43,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:43,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:43,682 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:43,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:43,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:43,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:43,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8b0a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43, skipping insertion in model container [2023-11-12 00:48:43,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:43,719 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:43,863 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_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2023-11-12 00:48:43,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:43,901 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:43,914 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_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2023-11-12 00:48:43,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:43,939 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:43,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43 WrapperNode [2023-11-12 00:48:43,939 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:43,940 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:43,941 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:43,941 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:43,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:43,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:43,997 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2023-11-12 00:48:44,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:44,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:44,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:44,002 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:44,012 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,025 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:44,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:44,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:44,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:44,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (1/1) ... [2023-11-12 00:48:44,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:44,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:44,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:44,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:48:44,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:48:44,205 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:44,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:44,398 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:44,540 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:44,540 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:48:44,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:44 BoogieIcfgContainer [2023-11-12 00:48:44,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:44,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:44,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:44,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:44,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:43" (1/3) ... [2023-11-12 00:48:44,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461a17dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:44, skipping insertion in model container [2023-11-12 00:48:44,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:43" (2/3) ... [2023-11-12 00:48:44,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461a17dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:44, skipping insertion in model container [2023-11-12 00:48:44,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:44" (3/3) ... [2023-11-12 00:48:44,554 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound10.c [2023-11-12 00:48:44,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:44,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:44,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:44,630 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;@b74e983, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:44,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:48:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:48:44,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:44,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:48:44,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:44,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1275866824, now seen corresponding path program 1 times [2023-11-12 00:48:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771311801] [2023-11-12 00:48:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:44,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:44,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:44,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771311801] [2023-11-12 00:48:44,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:48:44,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575204813] [2023-11-12 00:48:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:44,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:44,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:44,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:48:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:44,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:48:44,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:44,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:48:44,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575204813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:44,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:44,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:44,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762826255] [2023-11-12 00:48:44,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:48:44,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:48:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:44,947 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:44,990 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-11-12 00:48:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:48:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:48:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:45,000 INFO L225 Difference]: With dead ends: 29 [2023-11-12 00:48:45,002 INFO L226 Difference]: Without dead ends: 13 [2023-11-12 00:48:45,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:45,012 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:45,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-12 00:48:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-12 00:48:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:48:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-12 00:48:45,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-11-12 00:48:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:45,055 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-12 00:48:45,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-12 00:48:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:48:45,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:45,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:45,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:48:45,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:48:45,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:45,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1770432352, now seen corresponding path program 1 times [2023-11-12 00:48:45,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206067263] [2023-11-12 00:48:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:45,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:45,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206067263] [2023-11-12 00:48:45,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:48:45,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253886867] [2023-11-12 00:48:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:45,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:45,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:45,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:45,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:48:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:45,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:48:45,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:45,401 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:48:45,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253886867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:45,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:45,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:48:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341919143] [2023-11-12 00:48:45,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:45,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:45,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:45,405 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:45,449 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-12 00:48:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:48:45,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:48:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:45,452 INFO L225 Difference]: With dead ends: 23 [2023-11-12 00:48:45,452 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 00:48:45,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:45,456 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 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 [2023-11-12 00:48:45,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 00:48:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 00:48:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:48:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-12 00:48:45,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-11-12 00:48:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:45,468 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-12 00:48:45,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-12 00:48:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:48:45,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:45,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:45,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:48:45,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:45,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1768644892, now seen corresponding path program 1 times [2023-11-12 00:48:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:45,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047177948] [2023-11-12 00:48:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:45,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:45,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013654117] [2023-11-12 00:48:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:45,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:45,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:45,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:45,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:48:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:45,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:48:45,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:45,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:48:45,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047177948] [2023-11-12 00:48:45,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:48:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013654117] [2023-11-12 00:48:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013654117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:45,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:48:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854610710] [2023-11-12 00:48:45,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:45,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:48:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:45,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:48:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:48:45,869 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:45,924 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-12 00:48:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:48:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:48:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:45,927 INFO L225 Difference]: With dead ends: 25 [2023-11-12 00:48:45,927 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:48:45,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:48:45,932 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:45,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:48:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-12 00:48:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:48:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-12 00:48:45,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2023-11-12 00:48:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:45,966 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-12 00:48:45,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-12 00:48:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:48:45,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:45,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:45,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:46,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:46,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:46,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash 167458353, now seen corresponding path program 1 times [2023-11-12 00:48:46,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:46,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367338556] [2023-11-12 00:48:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:46,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:46,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:46,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910729874] [2023-11-12 00:48:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:46,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:46,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:46,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:46,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:48:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:46,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:48:46,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:46,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:46,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:46,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367338556] [2023-11-12 00:48:46,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:48:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910729874] [2023-11-12 00:48:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910729874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712675616] [2023-11-12 00:48:46,831 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:48:46,831 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:46,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:46,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:46,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:47,323 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-12 00:48:47,349 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:48,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1712675616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:48,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:48,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2023-11-12 00:48:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012806400] [2023-11-12 00:48:48,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:48,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:48:48,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:48,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:48:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:48:48,006 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:48:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:48,149 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-11-12 00:48:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:48:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-12 00:48:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:48,151 INFO L225 Difference]: With dead ends: 29 [2023-11-12 00:48:48,151 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 00:48:48,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:48:48,153 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:48,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 00:48:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-12 00:48:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:48:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-12 00:48:48,160 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-11-12 00:48:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:48,161 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-12 00:48:48,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:48:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-12 00:48:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:48:48,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:48,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:48,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:48,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:48,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1288276564, now seen corresponding path program 1 times [2023-11-12 00:48:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:48,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371993932] [2023-11-12 00:48:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:48,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:48,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403789495] [2023-11-12 00:48:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:48,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:48,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:48,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:48:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:48,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:48:48,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:48,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:48,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371993932] [2023-11-12 00:48:48,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:48:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403789495] [2023-11-12 00:48:48,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403789495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:48,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437503518] [2023-11-12 00:48:48,556 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:48:48,557 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:48,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:48,557 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:48,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:49,464 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-11-12 00:48:49,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:50,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:48:50,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:50,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-12 00:48:50,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482602996] [2023-11-12 00:48:50,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:50,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:48:50,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:50,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:48:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:48:50,316 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:48:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:50,428 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-11-12 00:48:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:48:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-12 00:48:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:50,430 INFO L225 Difference]: With dead ends: 55 [2023-11-12 00:48:50,430 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 00:48:50,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:48:50,432 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:50,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 52 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 00:48:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-12 00:48:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 00:48:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-11-12 00:48:50,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2023-11-12 00:48:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:50,447 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-11-12 00:48:50,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:48:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-11-12 00:48:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:48:50,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:50,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:50,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:50,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:50,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:50,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1286489104, now seen corresponding path program 1 times [2023-11-12 00:48:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:50,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906624317] [2023-11-12 00:48:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:50,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:50,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269071502] [2023-11-12 00:48:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:50,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:50,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:50,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:50,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:48:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:50,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:48:50,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:52,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:53,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:53,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906624317] [2023-11-12 00:48:53,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:48:53,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269071502] [2023-11-12 00:48:53,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269071502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:53,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959995190] [2023-11-12 00:48:53,175 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:48:53,175 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:53,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:53,177 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:53,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:54,002 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-11-12 00:48:54,054 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:54,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:48:54,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:54,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:54,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-12 00:48:54,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290882166] [2023-11-12 00:48:54,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:54,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:48:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:48:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:48:54,496 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:48:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:54,691 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-11-12 00:48:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:48:54,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-12 00:48:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:54,695 INFO L225 Difference]: With dead ends: 57 [2023-11-12 00:48:54,695 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 00:48:54,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:48:54,696 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:54,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 62 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 00:48:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-11-12 00:48:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:48:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-12 00:48:54,711 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 15 [2023-11-12 00:48:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:54,711 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-12 00:48:54,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:48:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-12 00:48:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:48:54,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:54,712 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:54,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:54,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:48:54,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:54,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1954110013, now seen corresponding path program 1 times [2023-11-12 00:48:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:54,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419477812] [2023-11-12 00:48:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:54,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:54,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586018273] [2023-11-12 00:48:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:54,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:54,930 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:54,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:48:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:54,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:48:54,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:56,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:48:56,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419477812] [2023-11-12 00:48:56,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:48:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586018273] [2023-11-12 00:48:56,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586018273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866885442] [2023-11-12 00:48:56,333 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:48:56,333 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:56,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:56,334 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:56,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:56,941 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-11-12 00:48:57,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:58,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1041#(and (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:48:58,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:58,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:58,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-11-12 00:48:58,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489220828] [2023-11-12 00:48:58,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:58,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:48:58,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:48:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:48:58,080 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:48:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:59,202 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2023-11-12 00:48:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:48:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-11-12 00:48:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:59,206 INFO L225 Difference]: With dead ends: 52 [2023-11-12 00:48:59,206 INFO L226 Difference]: Without dead ends: 50 [2023-11-12 00:48:59,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:48:59,208 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:59,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:48:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-12 00:48:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-12 00:48:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:48:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-12 00:48:59,229 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2023-11-12 00:48:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:59,230 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-12 00:48:59,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:48:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-12 00:48:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:48:59,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:59,232 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:59,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:59,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:48:59,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:59,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2145344073, now seen corresponding path program 1 times [2023-11-12 00:48:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:59,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286509108] [2023-11-12 00:48:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:59,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:59,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39137476] [2023-11-12 00:48:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:59,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:59,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:59,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:48:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:59,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:48:59,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:00,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:49:00,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286509108] [2023-11-12 00:49:00,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:49:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39137476] [2023-11-12 00:49:00,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39137476] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:00,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:00,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-11-12 00:49:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103462167] [2023-11-12 00:49:00,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:49:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:49:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:49:00,310 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:49:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:00,376 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-11-12 00:49:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:49:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-12 00:49:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:00,378 INFO L225 Difference]: With dead ends: 55 [2023-11-12 00:49:00,378 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 00:49:00,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:49:00,380 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:00,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:49:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 00:49:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-12 00:49:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:49:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-11-12 00:49:00,397 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 26 [2023-11-12 00:49:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:00,398 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-11-12 00:49:00,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:49:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-11-12 00:49:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 00:49:00,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:00,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-12 00:49:00,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:49:00,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:00,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash 542049488, now seen corresponding path program 2 times [2023-11-12 00:49:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:00,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745772520] [2023-11-12 00:49:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:00,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:00,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:00,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155592772] [2023-11-12 00:49:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:49:00,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:00,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:00,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:49:00,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 00:49:00,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:49:00,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:49:00,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:00,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:49:00,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:01,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745772520] [2023-11-12 00:49:01,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:49:01,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155592772] [2023-11-12 00:49:01,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155592772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:01,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881066937] [2023-11-12 00:49:01,002 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:49:01,002 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:01,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:01,003 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:01,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:01,504 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-11-12 00:49:01,575 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:02,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1738#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:49:02,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:49:02,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:49:02,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-12 00:49:02,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848801993] [2023-11-12 00:49:02,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:49:02,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:49:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:49:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:49:02,182 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 00:49:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:02,467 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2023-11-12 00:49:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 00:49:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2023-11-12 00:49:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:02,469 INFO L225 Difference]: With dead ends: 99 [2023-11-12 00:49:02,469 INFO L226 Difference]: Without dead ends: 91 [2023-11-12 00:49:02,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:49:02,471 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:02,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 75 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:49:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-12 00:49:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-12 00:49:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 00:49:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2023-11-12 00:49:02,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 39 [2023-11-12 00:49:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:02,508 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2023-11-12 00:49:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 00:49:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2023-11-12 00:49:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:49:02,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:02,511 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-12 00:49:02,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 00:49:02,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:02,712 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:02,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:02,712 INFO L85 PathProgramCache]: Analyzing trace with hash 11378456, now seen corresponding path program 3 times [2023-11-12 00:49:02,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:02,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696599054] [2023-11-12 00:49:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:02,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:02,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:02,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949201151] [2023-11-12 00:49:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:49:02,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:02,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:02,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:02,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:49:03,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:49:03,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-12 00:49:03,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:49:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:49:06,305 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:49:06,306 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:49:06,307 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:49:06,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:06,525 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:06,530 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:49:06,584 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,587 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,588 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,591 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,595 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,603 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,604 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,605 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,606 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,606 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,607 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:49:06 BoogieIcfgContainer [2023-11-12 00:49:06,660 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:49:06,661 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:49:06,661 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:49:06,662 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:49:06,663 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:44" (3/4) ... [2023-11-12 00:49:06,664 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-12 00:49:06,672 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,673 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,674 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,688 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,689 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,690 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,690 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,691 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,692 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,693 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,693 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:49:06,803 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:49:06,803 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:49:06,804 INFO L158 Benchmark]: Toolchain (without parser) took 23123.26ms. Allocated memory was 178.3MB in the beginning and 257.9MB in the end (delta: 79.7MB). Free memory was 142.5MB in the beginning and 113.2MB in the end (delta: 29.3MB). Peak memory consumption was 111.4MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,804 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 127.9MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:49:06,805 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.34ms. Allocated memory is still 178.3MB. Free memory was 142.5MB in the beginning and 131.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,806 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.14ms. Allocated memory is still 178.3MB. Free memory was 131.7MB in the beginning and 129.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,807 INFO L158 Benchmark]: Boogie Preprocessor took 26.81ms. Allocated memory is still 178.3MB. Free memory was 129.6MB in the beginning and 128.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,807 INFO L158 Benchmark]: RCFGBuilder took 514.43ms. Allocated memory is still 178.3MB. Free memory was 128.4MB in the beginning and 109.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,808 INFO L158 Benchmark]: TraceAbstraction took 22114.25ms. Allocated memory was 178.3MB in the beginning and 257.9MB in the end (delta: 79.7MB). Free memory was 108.6MB in the beginning and 121.9MB in the end (delta: -13.2MB). Peak memory consumption was 69.5MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,809 INFO L158 Benchmark]: Witness Printer took 142.27ms. Allocated memory is still 257.9MB. Free memory was 121.1MB in the beginning and 113.2MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 00:49:06,811 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 127.9MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.34ms. Allocated memory is still 178.3MB. Free memory was 142.5MB in the beginning and 131.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.14ms. Allocated memory is still 178.3MB. Free memory was 131.7MB in the beginning and 129.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.81ms. Allocated memory is still 178.3MB. Free memory was 129.6MB in the beginning and 128.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 514.43ms. Allocated memory is still 178.3MB. Free memory was 128.4MB in the beginning and 109.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 22114.25ms. Allocated memory was 178.3MB in the beginning and 257.9MB in the end (delta: 79.7MB). Free memory was 108.6MB in the beginning and 121.9MB in the end (delta: -13.2MB). Peak memory consumption was 69.5MB. Max. memory is 16.1GB. * Witness Printer took 142.27ms. Allocated memory is still 257.9MB. Free memory was 121.1MB in the beginning and 113.2MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=522, b=906, counter=0, p=1, q=0, x=522, y=906] [L33] EXPR counter++ VAL [a=522, b=906, counter=1, p=1, q=0, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=522, b=906, counter=1, p=1, q=0, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=261, b=453, counter=1, p=4, q=0, x=522, y=906] [L33] EXPR counter++ VAL [a=261, b=453, counter=2, p=4, q=0, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=261, b=453, counter=2, p=4, q=0, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=260, b=452, counter=2, p=4, q=2852, x=522, y=906] [L33] EXPR counter++ VAL [a=260, b=452, counter=3, p=4, q=2852, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=260, b=452, counter=3, p=4, q=2852, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=130, b=226, counter=3, p=16, q=2852, x=522, y=906] [L33] EXPR counter++ VAL [a=130, b=226, counter=4, p=16, q=2852, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=130, b=226, counter=4, p=16, q=2852, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=65, b=113, counter=4, p=64, q=2852, x=522, y=906] [L33] EXPR counter++ VAL [a=65, b=113, counter=5, p=64, q=2852, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=65, b=113, counter=5, p=64, q=2852, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=64, b=112, counter=5, p=64, q=14180, x=522, y=906] [L33] EXPR counter++ VAL [a=64, b=112, counter=6, p=64, q=14180, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=64, b=112, counter=6, p=64, q=14180, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=32, b=56, counter=6, p=256, q=14180, x=522, y=906] [L33] EXPR counter++ VAL [a=32, b=56, counter=7, p=256, q=14180, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=32, b=56, counter=7, p=256, q=14180, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=16, b=28, counter=7, p=1024, q=14180, x=522, y=906] [L33] EXPR counter++ VAL [a=16, b=28, counter=8, p=1024, q=14180, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=16, b=28, counter=8, p=1024, q=14180, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=8, b=14, counter=8, p=4096, q=14180, x=522, y=906] [L33] EXPR counter++ VAL [a=8, b=14, counter=9, p=4096, q=14180, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=8, b=14, counter=9, p=4096, q=14180, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=4, b=7, counter=9, p=16384, q=14180, x=522, y=906] [L33] EXPR counter++ VAL [a=4, b=7, counter=10, p=16384, q=14180, x=522, y=906] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=7, counter=10, p=16384, q=14180, x=522, y=906] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND TRUE a % 2 == 0 && b % 2 == 1 [L47] b = b - 1 [L48] q = q + a * p VAL [a=4, b=6, counter=10, p=16384, q=79716, x=522, y=906] [L33] EXPR counter++ VAL [a=4, b=6, counter=11, p=16384, q=79716, x=522, y=906] [L33] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.9s, OverallIterations: 10, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 113 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 104 mSDsluCounter, 446 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 340 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 388 IncrementalHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 106 mSDtfsCounter, 388 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=9, InterpolantAutomatonStates: 78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 263 ConstructedInterpolants, 2 QuantifiedInterpolants, 1616 SizeOfPredicates, 29 NumberOfNonLiveVariables, 621 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 105/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-12 00:49:06,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ff150-8a71-4ff3-a45d-9c33fc13962a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE