./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/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_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/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_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:34,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:35,036 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:00:35,042 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:35,043 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:35,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:35,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:35,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:35,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:35,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:35,073 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:35,074 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:35,074 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:35,075 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:35,075 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:35,076 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:35,076 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:35,077 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:35,077 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:35,078 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:35,079 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:35,079 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:35,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:35,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:35,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:00:35,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:35,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:00:35,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:35,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:35,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:35,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:35,084 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:00:35,084 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:35,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:35,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:35,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:35,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:35,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:35,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:35,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:35,087 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:35,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:35,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:35,088 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:35,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:35,088 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_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2023-11-12 01:00:35,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:35,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:35,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:35,459 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:35,459 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:35,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-11-12 01:00:38,573 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:38,852 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:38,853 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-11-12 01:00:38,863 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/data/30ebe2d06/bba0f85e5eb64ed9985e57615754ccc5/FLAGc23ed6998 [2023-11-12 01:00:38,881 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/data/30ebe2d06/bba0f85e5eb64ed9985e57615754ccc5 [2023-11-12 01:00:38,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:38,893 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:38,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:38,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:38,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:38,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:38" (1/1) ... [2023-11-12 01:00:38,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ab8e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:38, skipping insertion in model container [2023-11-12 01:00:38,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:38" (1/1) ... [2023-11-12 01:00:38,933 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:39,172 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_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-11-12 01:00:39,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:39,239 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:39,259 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_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-11-12 01:00:39,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:39,303 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:39,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39 WrapperNode [2023-11-12 01:00:39,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:39,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:39,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:39,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:39,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,371 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-11-12 01:00:39,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:39,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:39,374 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:39,374 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:39,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:39,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:39,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:39,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:39,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (1/1) ... [2023-11-12 01:00:39,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:39,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:39,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:39,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:00:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:00:39,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:00:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:00:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:39,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:00:39,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:00:39,594 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:39,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:39,826 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:39,886 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:39,886 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:00:39,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:39 BoogieIcfgContainer [2023-11-12 01:00:39,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:39,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:39,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:39,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:39,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:38" (1/3) ... [2023-11-12 01:00:39,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd1dd55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:39, skipping insertion in model container [2023-11-12 01:00:39,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:39" (2/3) ... [2023-11-12 01:00:39,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd1dd55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:39, skipping insertion in model container [2023-11-12 01:00:39,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:39" (3/3) ... [2023-11-12 01:00:39,902 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2023-11-12 01:00:39,931 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:39,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:00:40,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:40,029 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;@4ecd5e68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:40,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:00:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-12 01:00:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 01:00:40,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:40,048 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:40,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:40,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2023-11-12 01:00:40,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452838638] [2023-11-12 01:00:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:40,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:40,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106508418] [2023-11-12 01:00:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:40,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:40,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:40,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:40,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:40,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 01:00:40,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 01:00:40,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:40,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:40,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452838638] [2023-11-12 01:00:40,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106508418] [2023-11-12 01:00:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106508418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:40,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:40,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:40,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322193878] [2023-11-12 01:00:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:40,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:00:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:00:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:00:40,470 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 01:00:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:40,517 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2023-11-12 01:00:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:00:40,520 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2023-11-12 01:00:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:40,531 INFO L225 Difference]: With dead ends: 49 [2023-11-12 01:00:40,532 INFO L226 Difference]: Without dead ends: 28 [2023-11-12 01:00:40,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:00:40,542 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:40,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-12 01:00:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-12 01:00:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 01:00:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2023-11-12 01:00:40,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2023-11-12 01:00:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:40,595 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2023-11-12 01:00:40,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 01:00:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2023-11-12 01:00:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 01:00:40,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:40,598 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:40,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:40,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 01:00:40,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:40,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2023-11-12 01:00:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:40,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857836741] [2023-11-12 01:00:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:40,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:40,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047705301] [2023-11-12 01:00:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:40,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:40,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:40,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:00:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:40,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:00:40,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:00:40,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:00:41,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857836741] [2023-11-12 01:00:41,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047705301] [2023-11-12 01:00:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047705301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129050200] [2023-11-12 01:00:41,123 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-12 01:00:41,124 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:41,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:41,134 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:41,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:42,683 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:00:42,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:43,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [129050200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:43,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:00:43,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 14 [2023-11-12 01:00:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69245796] [2023-11-12 01:00:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:43,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 01:00:43,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 01:00:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:00:43,354 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 01:00:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:43,541 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-12 01:00:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 01:00:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-11-12 01:00:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:43,544 INFO L225 Difference]: With dead ends: 38 [2023-11-12 01:00:43,544 INFO L226 Difference]: Without dead ends: 30 [2023-11-12 01:00:43,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:00:43,546 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:43,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:00:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-12 01:00:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-12 01:00:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 01:00:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-11-12 01:00:43,564 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2023-11-12 01:00:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:43,565 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-11-12 01:00:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 01:00:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-11-12 01:00:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:00:43,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:43,567 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:43,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:43,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:43,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:43,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2023-11-12 01:00:43,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:43,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056043788] [2023-11-12 01:00:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:43,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:43,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:43,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795617798] [2023-11-12 01:00:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:43,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:43,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:43,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:00:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:43,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 01:00:43,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:00:43,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 01:00:44,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056043788] [2023-11-12 01:00:44,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795617798] [2023-11-12 01:00:44,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795617798] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:44,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:44,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-11-12 01:00:44,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527292910] [2023-11-12 01:00:44,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:00:44,058 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 01:00:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:44,138 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-11-12 01:00:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:00:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2023-11-12 01:00:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:44,143 INFO L225 Difference]: With dead ends: 36 [2023-11-12 01:00:44,143 INFO L226 Difference]: Without dead ends: 34 [2023-11-12 01:00:44,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:00:44,150 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:44,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 110 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-12 01:00:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-12 01:00:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 01:00:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-11-12 01:00:44,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2023-11-12 01:00:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:44,197 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-11-12 01:00:44,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 01:00:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-11-12 01:00:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 01:00:44,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:44,199 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:44,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:44,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:44,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:44,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1810277145, now seen corresponding path program 1 times [2023-11-12 01:00:44,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:44,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348803124] [2023-11-12 01:00:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:44,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:44,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320238926] [2023-11-12 01:00:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:44,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:44,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:44,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:44,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 01:00:44,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 01:00:44,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 01:00:44,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:44,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348803124] [2023-11-12 01:00:44,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:44,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320238926] [2023-11-12 01:00:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320238926] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:44,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:44,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-11-12 01:00:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304166618] [2023-11-12 01:00:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:44,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:00:44,832 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:00:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:44,918 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-11-12 01:00:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:00:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-11-12 01:00:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:44,921 INFO L225 Difference]: With dead ends: 47 [2023-11-12 01:00:44,922 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 01:00:44,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:00:44,924 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:44,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 01:00:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-11-12 01:00:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 01:00:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2023-11-12 01:00:44,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 33 [2023-11-12 01:00:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:44,948 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2023-11-12 01:00:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:00:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2023-11-12 01:00:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 01:00:44,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:44,950 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:44,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:45,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:45,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:45,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1313498982, now seen corresponding path program 1 times [2023-11-12 01:00:45,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:45,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966963021] [2023-11-12 01:00:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:45,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:45,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:45,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31733612] [2023-11-12 01:00:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:45,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:45,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:00:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:45,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 01:00:45,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:00:45,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 01:00:45,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966963021] [2023-11-12 01:00:45,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31733612] [2023-11-12 01:00:45,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31733612] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:45,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-12 01:00:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728236787] [2023-11-12 01:00:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:45,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:00:45,619 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 01:00:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:45,695 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-11-12 01:00:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:00:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-11-12 01:00:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:45,697 INFO L225 Difference]: With dead ends: 51 [2023-11-12 01:00:45,697 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 01:00:45,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:00:45,698 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:45,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 01:00:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-12 01:00:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 01:00:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2023-11-12 01:00:45,740 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 38 [2023-11-12 01:00:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:45,742 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2023-11-12 01:00:45,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 01:00:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2023-11-12 01:00:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 01:00:45,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:45,744 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:45,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 01:00:45,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:45,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:45,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2023-11-12 01:00:45,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:45,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845897495] [2023-11-12 01:00:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:45,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672353883] [2023-11-12 01:00:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:45,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:45,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:45,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:46,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:00:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:46,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 01:00:46,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:00:46,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:46,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:46,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845897495] [2023-11-12 01:00:46,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672353883] [2023-11-12 01:00:46,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672353883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1786555525] [2023-11-12 01:00:46,406 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 01:00:46,406 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:46,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:46,408 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:46,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:47,875 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-12 01:00:47,880 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:00:47,882 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:49,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1786555525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:49,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:49,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 19 [2023-11-12 01:00:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732442689] [2023-11-12 01:00:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:49,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:00:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:00:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:00:49,060 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-12 01:00:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:49,371 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-11-12 01:00:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 01:00:49,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2023-11-12 01:00:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:49,373 INFO L225 Difference]: With dead ends: 73 [2023-11-12 01:00:49,373 INFO L226 Difference]: Without dead ends: 71 [2023-11-12 01:00:49,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:00:49,375 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:49,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:00:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-12 01:00:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-11-12 01:00:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-12 01:00:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2023-11-12 01:00:49,401 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 43 [2023-11-12 01:00:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:49,401 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2023-11-12 01:00:49,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-12 01:00:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2023-11-12 01:00:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 01:00:49,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:49,403 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:49,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:49,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:49,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:49,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2023-11-12 01:00:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:49,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380998347] [2023-11-12 01:00:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:49,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:49,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264292459] [2023-11-12 01:00:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:49,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:49,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:49,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:00:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:49,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:00:49,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-12 01:00:49,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-12 01:00:49,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:49,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380998347] [2023-11-12 01:00:49,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:49,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264292459] [2023-11-12 01:00:49,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264292459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:49,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641778955] [2023-11-12 01:00:49,856 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-12 01:00:49,856 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:49,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:49,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:49,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:55,671 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 01:00:55,675 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:00:55,679 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:58,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2200#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 01:00:58,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:58,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:00:58,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-11-12 01:00:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266796511] [2023-11-12 01:00:58,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:00:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:00:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-12 01:00:58,422 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 01:00:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:58,656 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-11-12 01:00:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:00:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2023-11-12 01:00:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:58,659 INFO L225 Difference]: With dead ends: 111 [2023-11-12 01:00:58,659 INFO L226 Difference]: Without dead ends: 103 [2023-11-12 01:00:58,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2023-11-12 01:00:58,661 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:58,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 203 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-12 01:00:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2023-11-12 01:00:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 01:00:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2023-11-12 01:00:58,695 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 52 [2023-11-12 01:00:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:58,695 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2023-11-12 01:00:58,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 01:00:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2023-11-12 01:00:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 01:00:58,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:58,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:58,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:58,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:58,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:58,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2023-11-12 01:00:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:58,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167026168] [2023-11-12 01:00:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:58,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:58,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800192028] [2023-11-12 01:00:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:58,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:58,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:58,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:00:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:59,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 01:00:59,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 01:00:59,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-12 01:00:59,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:59,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167026168] [2023-11-12 01:00:59,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:59,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800192028] [2023-11-12 01:00:59,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800192028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:59,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271660678] [2023-11-12 01:00:59,387 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 01:00:59,387 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:59,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:59,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:59,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:03,841 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 01:01:03,845 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:01:03,846 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:07,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2897#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 01:01:07,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:07,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:01:07,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-11-12 01:01:07,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720005995] [2023-11-12 01:01:07,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:07,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:01:07,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:07,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:01:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-11-12 01:01:07,115 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-12 01:01:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:07,752 INFO L93 Difference]: Finished difference Result 137 states and 189 transitions. [2023-11-12 01:01:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 01:01:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 58 [2023-11-12 01:01:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:07,756 INFO L225 Difference]: With dead ends: 137 [2023-11-12 01:01:07,756 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 01:01:07,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 01:01:07,758 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:07,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 244 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 01:01:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2023-11-12 01:01:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-12 01:01:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2023-11-12 01:01:07,798 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 58 [2023-11-12 01:01:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:07,798 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2023-11-12 01:01:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-12 01:01:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2023-11-12 01:01:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 01:01:07,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:07,800 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:07,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:08,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 01:01:08,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:08,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1216164650, now seen corresponding path program 2 times [2023-11-12 01:01:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:08,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255514893] [2023-11-12 01:01:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:08,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:08,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:08,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450499002] [2023-11-12 01:01:08,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:08,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:08,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:08,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:08,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:01:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 01:01:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:08,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 01:01:08,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-12 01:01:08,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:08,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:08,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255514893] [2023-11-12 01:01:08,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450499002] [2023-11-12 01:01:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450499002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55786253] [2023-11-12 01:01:08,370 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 01:01:08,371 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:08,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:08,371 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:08,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:12,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 01:01:12,056 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:01:12,057 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:15,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3518#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 01:01:15,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:15,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:15,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-12 01:01:15,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450125290] [2023-11-12 01:01:15,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:15,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 01:01:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 01:01:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-11-12 01:01:15,402 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-12 01:01:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:15,699 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2023-11-12 01:01:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:01:15,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 63 [2023-11-12 01:01:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:15,702 INFO L225 Difference]: With dead ends: 163 [2023-11-12 01:01:15,702 INFO L226 Difference]: Without dead ends: 161 [2023-11-12 01:01:15,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2023-11-12 01:01:15,704 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:15,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 188 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-12 01:01:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2023-11-12 01:01:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 86 states have (on average 1.186046511627907) internal successors, (102), 88 states have internal predecessors, (102), 58 states have call successors, (58), 13 states have call predecessors, (58), 13 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-12 01:01:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 217 transitions. [2023-11-12 01:01:15,772 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 217 transitions. Word has length 63 [2023-11-12 01:01:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:15,772 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 217 transitions. [2023-11-12 01:01:15,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-12 01:01:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 217 transitions. [2023-11-12 01:01:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 01:01:15,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:15,774 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:15,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:15,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:15,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:15,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1984692712, now seen corresponding path program 1 times [2023-11-12 01:01:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:15,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079284359] [2023-11-12 01:01:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:15,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:15,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613244162] [2023-11-12 01:01:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:15,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:15,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:15,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:15,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 01:01:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:16,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 01:01:16,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-12 01:01:16,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-12 01:01:16,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079284359] [2023-11-12 01:01:16,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613244162] [2023-11-12 01:01:16,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613244162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467614896] [2023-11-12 01:01:16,273 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 01:01:16,273 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:16,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:16,274 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:16,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:19,178 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 01:01:19,182 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:01:19,185 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:21,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4435#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 01:01:21,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:21,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:01:21,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-11-12 01:01:21,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30288986] [2023-11-12 01:01:21,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:21,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:01:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:01:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-11-12 01:01:21,162 INFO L87 Difference]: Start difference. First operand 158 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-12 01:01:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:21,449 INFO L93 Difference]: Finished difference Result 165 states and 224 transitions. [2023-11-12 01:01:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:01:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2023-11-12 01:01:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:21,452 INFO L225 Difference]: With dead ends: 165 [2023-11-12 01:01:21,453 INFO L226 Difference]: Without dead ends: 163 [2023-11-12 01:01:21,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-11-12 01:01:21,454 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:21,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-12 01:01:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-12 01:01:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 91 states have internal predecessors, (105), 59 states have call successors, (59), 14 states have call predecessors, (59), 14 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-12 01:01:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 222 transitions. [2023-11-12 01:01:21,523 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 222 transitions. Word has length 65 [2023-11-12 01:01:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:21,523 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 222 transitions. [2023-11-12 01:01:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-12 01:01:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 222 transitions. [2023-11-12 01:01:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 01:01:21,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:21,525 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:21,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:21,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:01:21,726 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:21,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash -491172873, now seen corresponding path program 3 times [2023-11-12 01:01:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:21,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140899725] [2023-11-12 01:01:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:21,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:21,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109081727] [2023-11-12 01:01:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:01:21,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:21,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:21,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:21,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4104e8-e9e4-4245-b70e-dc2a1542acf7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 01:01:21,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:01:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:21,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-12 01:01:21,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-12 01:01:27,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:27,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140899725] [2023-11-12 01:01:27,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109081727] [2023-11-12 01:01:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109081727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614385726] [2023-11-12 01:01:27,369 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 01:01:27,369 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:27,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:27,369 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:27,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:31,301 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 01:01:31,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-12 01:01:31,308 INFO L180 IcfgInterpreter]: Interpretation finished