./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/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_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/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_e38014e1-8010-4a7d-88c6-db13e892f566/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 5cf588c7d7521936f2238a5a4b8ed55e91050a69daa6016b5b2b4a486ef1b9f8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:47:29,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:47:29,432 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:47:29,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:47:29,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:47:29,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:47:29,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:47:29,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:47:29,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:47:29,493 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:47:29,494 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:47:29,495 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:47:29,496 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:47:29,498 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:47:29,498 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:47:29,499 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:47:29,499 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:47:29,500 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:47:29,500 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:47:29,501 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:47:29,502 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:47:29,502 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:47:29,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:47:29,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:47:29,505 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:47:29,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:47:29,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:47:29,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:47:29,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:47:29,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:47:29,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:47:29,509 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:47:29,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:47:29,510 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:47:29,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:47:29,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:47:29,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:29,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:47:29,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:47:29,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:47:29,512 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:47:29,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:47:29,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:47:29,513 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:47:29,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:47:29,514 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_e38014e1-8010-4a7d-88c6-db13e892f566/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cf588c7d7521936f2238a5a4b8ed55e91050a69daa6016b5b2b4a486ef1b9f8 [2023-11-12 00:47:29,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:47:29,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:47:29,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:47:29,831 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:47:29,832 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:47:29,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench/egcd-ll.c [2023-11-12 00:47:33,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:47:33,372 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:47:33,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/sv-benchmarks/c/nla-digbench/egcd-ll.c [2023-11-12 00:47:33,381 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/data/0c701e3d0/337d79702b1949eb8d2a0cf5ec9cdcbd/FLAG8559b9161 [2023-11-12 00:47:33,402 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/data/0c701e3d0/337d79702b1949eb8d2a0cf5ec9cdcbd [2023-11-12 00:47:33,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:47:33,407 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:47:33,408 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:33,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:47:33,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:47:33,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef7c4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33, skipping insertion in model container [2023-11-12 00:47:33,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,441 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:47:33,608 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_e38014e1-8010-4a7d-88c6-db13e892f566/sv-benchmarks/c/nla-digbench/egcd-ll.c[489,502] [2023-11-12 00:47:33,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:33,638 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:47:33,652 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_e38014e1-8010-4a7d-88c6-db13e892f566/sv-benchmarks/c/nla-digbench/egcd-ll.c[489,502] [2023-11-12 00:47:33,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:33,689 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:47:33,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33 WrapperNode [2023-11-12 00:47:33,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:33,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:33,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:47:33,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:47:33,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,728 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-11-12 00:47:33,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:33,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:47:33,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:47:33,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:47:33,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:47:33,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:47:33,753 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:47:33,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:47:33,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (1/1) ... [2023-11-12 00:47:33,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:33,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:33,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:47:33,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:47:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:47:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:47:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:47:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:47:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:47:33,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:47:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:47:33,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:47:33,895 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:47:33,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:47:34,057 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:47:34,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:47:34,119 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:47:34,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:34 BoogieIcfgContainer [2023-11-12 00:47:34,122 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:47:34,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:47:34,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:47:34,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:47:34,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:47:33" (1/3) ... [2023-11-12 00:47:34,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a081848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:34, skipping insertion in model container [2023-11-12 00:47:34,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:33" (2/3) ... [2023-11-12 00:47:34,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a081848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:34, skipping insertion in model container [2023-11-12 00:47:34,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:34" (3/3) ... [2023-11-12 00:47:34,131 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2023-11-12 00:47:34,152 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:47:34,152 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:47:34,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:47:34,209 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;@19d45d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:47:34,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:47:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 00:47:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:47:34,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:34,220 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:34,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:34,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1220168786, now seen corresponding path program 1 times [2023-11-12 00:47:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:34,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32730648] [2023-11-12 00:47:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:34,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:47:34,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32730648] [2023-11-12 00:47:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32730648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:34,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:47:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559256667] [2023-11-12 00:47:34,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:34,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:47:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:34,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:47:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:47:34,481 INFO L87 Difference]: Start difference. First operand has 23 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:47:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:34,519 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2023-11-12 00:47:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:47:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-12 00:47:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:34,529 INFO L225 Difference]: With dead ends: 40 [2023-11-12 00:47:34,530 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 00:47:34,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 00:47:34,537 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:34,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 00:47:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-12 00:47:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 00:47:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-12 00:47:34,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 13 [2023-11-12 00:47:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:34,591 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-12 00:47:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:47:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-12 00:47:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:47:34,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:34,594 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:34,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:47:34,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:34,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1285917523, now seen corresponding path program 1 times [2023-11-12 00:47:34,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:34,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441151457] [2023-11-12 00:47:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:34,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:34,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061336171] [2023-11-12 00:47:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:34,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:34,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:34,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:47:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:34,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 00:47:34,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:34,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:34,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:34,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441151457] [2023-11-12 00:47:34,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061336171] [2023-11-12 00:47:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061336171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:34,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:34,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:47:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902933600] [2023-11-12 00:47:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:47:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:47:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:34,845 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:47:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:34,979 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2023-11-12 00:47:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:47:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-12 00:47:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:34,983 INFO L225 Difference]: With dead ends: 36 [2023-11-12 00:47:34,984 INFO L226 Difference]: Without dead ends: 34 [2023-11-12 00:47:34,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:47:34,987 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:34,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 87 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-12 00:47:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-11-12 00:47:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:47:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2023-11-12 00:47:35,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2023-11-12 00:47:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:35,020 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2023-11-12 00:47:35,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:47:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2023-11-12 00:47:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:47:35,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:35,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:35,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:35,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:35,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2098202172, now seen corresponding path program 1 times [2023-11-12 00:47:35,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:35,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355517352] [2023-11-12 00:47:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:35,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138046748] [2023-11-12 00:47:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:35,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:35,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:47:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:35,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:47:35,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:35,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:35,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355517352] [2023-11-12 00:47:35,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138046748] [2023-11-12 00:47:35,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138046748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982448210] [2023-11-12 00:47:35,749 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:47:35,750 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:35,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:35,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:35,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:36,489 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-11-12 00:47:36,518 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-12 00:47:36,598 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1982448210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:37,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:37,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-11-12 00:47:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775782168] [2023-11-12 00:47:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:47:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:47:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:47:37,512 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 5 states have internal predecessors, (9), 3 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 00:47:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:37,807 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-11-12 00:47:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:47:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 5 states have internal predecessors, (9), 3 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) Word has length 18 [2023-11-12 00:47:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:37,809 INFO L225 Difference]: With dead ends: 40 [2023-11-12 00:47:37,809 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 00:47:37,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:47:37,811 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:47:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 00:47:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-12 00:47:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-12 00:47:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-12 00:47:37,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 18 [2023-11-12 00:47:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:37,834 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-12 00:47:37,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 5 states have internal predecessors, (9), 3 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 00:47:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-12 00:47:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:47:37,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:37,835 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:37,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:38,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:38,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:38,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1749456426, now seen corresponding path program 1 times [2023-11-12 00:47:38,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:38,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371095021] [2023-11-12 00:47:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:38,071 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:38,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294169838] [2023-11-12 00:47:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:38,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:38,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:38,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:47:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:38,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:47:38,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:47:38,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:38,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:38,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371095021] [2023-11-12 00:47:38,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294169838] [2023-11-12 00:47:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294169838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:38,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:38,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:47:38,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660907535] [2023-11-12 00:47:38,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:38,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:47:38,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:47:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:47:38,194 INFO L87 Difference]: Start difference. First operand 36 states and 46 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:47:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:38,263 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-11-12 00:47:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:47:38,264 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2023-11-12 00:47:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:38,267 INFO L225 Difference]: With dead ends: 42 [2023-11-12 00:47:38,267 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 00:47:38,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 00:47:38,273 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:38,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 00:47:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-12 00:47:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-12 00:47:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-11-12 00:47:38,309 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 29 [2023-11-12 00:47:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:38,310 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-11-12 00:47:38,310 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:47:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-11-12 00:47:38,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 00:47:38,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:38,313 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:38,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:47:38,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:38,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:38,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash 94602887, now seen corresponding path program 1 times [2023-11-12 00:47:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103883865] [2023-11-12 00:47:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:38,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:38,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926530171] [2023-11-12 00:47:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:38,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:38,554 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:38,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:47:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:38,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:47:38,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:47:38,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:39,209 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 00:47:39,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:39,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103883865] [2023-11-12 00:47:39,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926530171] [2023-11-12 00:47:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926530171] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-12 00:47:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141926571] [2023-11-12 00:47:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:47:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:47:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:47:39,220 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:47:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:39,295 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-11-12 00:47:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:47:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-11-12 00:47:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:39,298 INFO L225 Difference]: With dead ends: 46 [2023-11-12 00:47:39,299 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 00:47:39,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:47:39,300 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:39,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 00:47:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-12 00:47:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-12 00:47:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-11-12 00:47:39,360 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 30 [2023-11-12 00:47:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:39,361 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-11-12 00:47:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:47:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-11-12 00:47:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 00:47:39,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:39,363 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:39,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:39,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:39,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:39,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:39,575 INFO L85 PathProgramCache]: Analyzing trace with hash 655721895, now seen corresponding path program 1 times [2023-11-12 00:47:39,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:39,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623185670] [2023-11-12 00:47:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:39,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:39,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:39,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527916266] [2023-11-12 00:47:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:39,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:39,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:39,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:39,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:47:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:39,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:47:39,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:47:39,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:47:39,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623185670] [2023-11-12 00:47:39,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527916266] [2023-11-12 00:47:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527916266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536897074] [2023-11-12 00:47:39,915 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 00:47:39,915 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:39,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:39,916 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:39,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:40,674 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-11-12 00:47:40,690 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-12 00:47:40,748 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:41,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1536897074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:41,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:47:41,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 8] total 21 [2023-11-12 00:47:41,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666804094] [2023-11-12 00:47:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:41,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:47:41,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:47:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:47:41,778 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:47:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:42,122 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-12 00:47:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:47:42,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2023-11-12 00:47:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:42,123 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:47:42,123 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 00:47:42,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:47:42,125 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:42,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:47:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 00:47:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-12 00:47:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 00:47:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-12 00:47:42,143 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2023-11-12 00:47:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:42,143 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-12 00:47:42,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:47:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-12 00:47:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 00:47:42,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:42,145 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:42,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:42,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:42,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:42,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1398144982, now seen corresponding path program 2 times [2023-11-12 00:47:42,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12838252] [2023-11-12 00:47:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:42,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394258454] [2023-11-12 00:47:42,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:42,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:42,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:42,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:47:42,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:47:42,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:42,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:47:42,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 00:47:42,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:47:43,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:43,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12838252] [2023-11-12 00:47:43,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:43,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394258454] [2023-11-12 00:47:43,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394258454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496460506] [2023-11-12 00:47:43,158 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:47:43,158 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:43,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:43,159 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:43,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:45,269 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-12 00:47:45,274 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-12 00:47:45,308 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:46,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1592#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:47:46,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:46,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:47:46,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-12 00:47:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309920433] [2023-11-12 00:47:46,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:46,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:47:46,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:46,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:47:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:47:46,419 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-12 00:47:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:47,832 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-11-12 00:47:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:47:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 35 [2023-11-12 00:47:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:47,837 INFO L225 Difference]: With dead ends: 66 [2023-11-12 00:47:47,837 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 00:47:47,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:47:47,838 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:47,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 153 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:47:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 00:47:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2023-11-12 00:47:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 00:47:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-12 00:47:47,864 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2023-11-12 00:47:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:47,865 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-12 00:47:47,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-12 00:47:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-11-12 00:47:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 00:47:47,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:47,866 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:47,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:48,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:48,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:48,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash 168438823, now seen corresponding path program 3 times [2023-11-12 00:47:48,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:48,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652673153] [2023-11-12 00:47:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:48,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:48,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:48,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962597709] [2023-11-12 00:47:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:47:48,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:48,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:48,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:48,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:47:48,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:47:48,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:48,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 00:47:48,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:47:48,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:47:49,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652673153] [2023-11-12 00:47:49,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962597709] [2023-11-12 00:47:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962597709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126070286] [2023-11-12 00:47:49,017 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:47:49,017 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:49,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:49,018 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:49,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:50,567 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-12 00:47:50,571 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-12 00:47:50,593 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:54,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2044#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:47:54,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:54,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:47:54,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-12 00:47:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600378263] [2023-11-12 00:47:54,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:54,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:47:54,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:47:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2023-11-12 00:47:54,064 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 00:47:56,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:47:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:56,774 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-11-12 00:47:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:47:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) Word has length 40 [2023-11-12 00:47:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:56,777 INFO L225 Difference]: With dead ends: 72 [2023-11-12 00:47:56,778 INFO L226 Difference]: Without dead ends: 66 [2023-11-12 00:47:56,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=89, Invalid=510, Unknown=1, NotChecked=0, Total=600 [2023-11-12 00:47:56,779 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:56,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 113 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 00:47:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-12 00:47:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2023-11-12 00:47:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:47:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-11-12 00:47:56,803 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 40 [2023-11-12 00:47:56,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:56,804 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-11-12 00:47:56,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 00:47:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-12 00:47:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:47:56,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:56,805 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:56,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:57,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:47:57,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:57,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1145962483, now seen corresponding path program 1 times [2023-11-12 00:47:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:57,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298139310] [2023-11-12 00:47:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:57,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224199368] [2023-11-12 00:47:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:57,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:47:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:57,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:47:57,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-12 00:47:57,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-12 00:47:57,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298139310] [2023-11-12 00:47:57,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224199368] [2023-11-12 00:47:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224199368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323481107] [2023-11-12 00:47:57,636 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 00:47:57,637 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:57,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:57,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:57,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:59,278 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 00:47:59,288 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-12 00:47:59,329 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:03,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2569#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:48:03,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:03,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:03,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-12 00:48:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195315535] [2023-11-12 00:48:03,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:48:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:03,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:48:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2023-11-12 00:48:03,864 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 00:48:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:04,323 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2023-11-12 00:48:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:48:04,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2023-11-12 00:48:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:04,325 INFO L225 Difference]: With dead ends: 74 [2023-11-12 00:48:04,325 INFO L226 Difference]: Without dead ends: 62 [2023-11-12 00:48:04,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2023-11-12 00:48:04,327 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:04,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:48:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-12 00:48:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-12 00:48:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:48:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2023-11-12 00:48:04,365 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2023-11-12 00:48:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:04,366 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2023-11-12 00:48:04,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 00:48:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2023-11-12 00:48:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:48:04,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:04,368 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:04,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:04,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 00:48:04,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:04,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:04,573 INFO L85 PathProgramCache]: Analyzing trace with hash -172900502, now seen corresponding path program 4 times [2023-11-12 00:48:04,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:04,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37125448] [2023-11-12 00:48:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:04,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:48:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727494017] [2023-11-12 00:48:04,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:48:04,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:04,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:04,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:04,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:48:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:04,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 00:48:04,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-12 00:48:12,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 87 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-12 00:48:15,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37125448] [2023-11-12 00:48:15,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:48:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727494017] [2023-11-12 00:48:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727494017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152222572] [2023-11-12 00:48:15,026 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:48:15,026 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:15,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:15,027 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:15,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:16,862 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-12 00:48:16,876 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-12 00:48:16,903 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:23,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3206#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:48:23,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:23,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-11-12 00:48:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583217082] [2023-11-12 00:48:23,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 00:48:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 00:48:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=659, Unknown=2, NotChecked=0, Total=756 [2023-11-12 00:48:23,840 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2023-11-12 00:48:29,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:48:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:29,863 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-11-12 00:48:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:48:29,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 69 [2023-11-12 00:48:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:29,864 INFO L225 Difference]: With dead ends: 79 [2023-11-12 00:48:29,864 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:48:29,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=146, Invalid=908, Unknown=2, NotChecked=0, Total=1056 [2023-11-12 00:48:29,866 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:29,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 204 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-11-12 00:48:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:48:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:48:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:48:29,868 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2023-11-12 00:48:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:29,868 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:48:29,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2023-11-12 00:48:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:48:29,869 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:48:29,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:48:29,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:30,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e38014e1-8010-4a7d-88c6-db13e892f566/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:48:30,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.