./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench/egcd-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cf588c7d7521936f2238a5a4b8ed55e91050a69daa6016b5b2b4a486ef1b9f8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:21:49,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:21:50,052 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 05:21:50,059 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:21:50,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:21:50,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:21:50,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:21:50,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:21:50,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:21:50,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:21:50,094 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:21:50,095 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:21:50,096 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:21:50,097 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:21:50,097 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:21:50,098 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:21:50,098 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:21:50,099 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:21:50,100 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:21:50,101 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:21:50,101 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:21:50,102 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:21:50,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:21:50,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:21:50,105 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:21:50,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:21:50,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:21:50,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:21:50,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:21:50,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:21:50,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:21:50,109 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 05:21:50,110 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:21:50,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:21:50,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:21:50,111 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:21:50,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:21:50,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:21:50,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:50,113 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:21:50,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:21:50,114 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:21:50,114 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:21:50,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:21:50,115 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:21:50,115 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:21:50,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:21:50,116 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_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cf588c7d7521936f2238a5a4b8ed55e91050a69daa6016b5b2b4a486ef1b9f8 [2023-11-19 05:21:50,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:21:50,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:21:50,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:21:50,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:21:50,544 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:21:50,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/nla-digbench/egcd-ll.c [2023-11-19 05:21:53,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:21:54,140 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:21:54,141 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/sv-benchmarks/c/nla-digbench/egcd-ll.c [2023-11-19 05:21:54,149 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/data/097130a06/d43ed9a890d740189e0d6be20a465698/FLAG8feee143a [2023-11-19 05:21:54,163 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/data/097130a06/d43ed9a890d740189e0d6be20a465698 [2023-11-19 05:21:54,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:21:54,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:21:54,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:54,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:21:54,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:21:54,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a419bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54, skipping insertion in model container [2023-11-19 05:21:54,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,211 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:21:54,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:54,441 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:21:54,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:54,477 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:21:54,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54 WrapperNode [2023-11-19 05:21:54,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:54,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:54,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:21:54,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:21:54,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,496 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,521 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 117 [2023-11-19 05:21:54,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:54,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:21:54,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:21:54,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:21:54,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:21:54,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:21:54,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:21:54,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:21:54,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (1/1) ... [2023-11-19 05:21:54,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:54,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:54,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:21:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:21:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:21:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:21:54,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:21:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:21:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:21:54,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:21:54,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:21:54,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:21:54,737 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:21:54,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:21:55,237 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:21:55,276 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:21:55,276 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:21:55,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:55 BoogieIcfgContainer [2023-11-19 05:21:55,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:21:55,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:21:55,300 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:21:55,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:21:55,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:21:54" (1/3) ... [2023-11-19 05:21:55,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d275f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:55, skipping insertion in model container [2023-11-19 05:21:55,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:54" (2/3) ... [2023-11-19 05:21:55,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d275f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:55, skipping insertion in model container [2023-11-19 05:21:55,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:55" (3/3) ... [2023-11-19 05:21:55,315 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2023-11-19 05:21:55,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:21:55,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-11-19 05:21:55,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:21:55,407 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;@5c759f67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:21:55,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-11-19 05:21:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 64 states have (on average 1.921875) internal successors, (123), 120 states have internal predecessors, (123), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:21:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:21:55,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:55,424 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:55,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:55,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2046556724, now seen corresponding path program 1 times [2023-11-19 05:21:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433920045] [2023-11-19 05:21:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:55,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:55,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:55,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433920045] [2023-11-19 05:21:55,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433920045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:55,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:55,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:55,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169094805] [2023-11-19 05:21:55,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:21:55,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:21:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:21:55,707 INFO L87 Difference]: Start difference. First operand has 132 states, 64 states have (on average 1.921875) internal successors, (123), 120 states have internal predecessors, (123), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:55,778 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2023-11-19 05:21:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:21:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-11-19 05:21:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:55,793 INFO L225 Difference]: With dead ends: 192 [2023-11-19 05:21:55,793 INFO L226 Difference]: Without dead ends: 129 [2023-11-19 05:21:55,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:21:55,806 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:55,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:21:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-19 05:21:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-19 05:21:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 63 states have (on average 1.9047619047619047) internal successors, (120), 118 states have internal predecessors, (120), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 05:21:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2023-11-19 05:21:55,864 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 10 [2023-11-19 05:21:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:55,866 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2023-11-19 05:21:55,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2023-11-19 05:21:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:21:55,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:55,869 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:21:55,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:55,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2046550850, now seen corresponding path program 1 times [2023-11-19 05:21:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413999360] [2023-11-19 05:21:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:55,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:21:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727753626] [2023-11-19 05:21:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:55,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:55,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:55,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:55,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:21:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:56,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:21:56,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:56,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:56,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413999360] [2023-11-19 05:21:56,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:21:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727753626] [2023-11-19 05:21:56,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727753626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:56,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:56,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518962218] [2023-11-19 05:21:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:56,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:56,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:56,130 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:56,424 INFO L93 Difference]: Finished difference Result 246 states and 260 transitions. [2023-11-19 05:21:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-11-19 05:21:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:56,428 INFO L225 Difference]: With dead ends: 246 [2023-11-19 05:21:56,429 INFO L226 Difference]: Without dead ends: 242 [2023-11-19 05:21:56,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:56,431 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 105 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:56,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 123 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:21:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-19 05:21:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 168. [2023-11-19 05:21:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 152 states have internal predecessors, (183), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 05:21:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2023-11-19 05:21:56,461 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 10 [2023-11-19 05:21:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:56,461 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2023-11-19 05:21:56,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2023-11-19 05:21:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:21:56,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:56,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:56,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:56,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:56,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:56,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash -359653180, now seen corresponding path program 1 times [2023-11-19 05:21:56,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:56,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910188063] [2023-11-19 05:21:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:56,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:21:56,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121598027] [2023-11-19 05:21:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:56,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:56,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:56,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:21:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:56,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:21:56,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:56,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:56,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910188063] [2023-11-19 05:21:56,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:21:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121598027] [2023-11-19 05:21:56,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121598027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:56,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:56,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838298449] [2023-11-19 05:21:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:56,834 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:57,025 INFO L93 Difference]: Finished difference Result 285 states and 333 transitions. [2023-11-19 05:21:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2023-11-19 05:21:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:57,030 INFO L225 Difference]: With dead ends: 285 [2023-11-19 05:21:57,031 INFO L226 Difference]: Without dead ends: 277 [2023-11-19 05:21:57,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:57,034 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 100 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:57,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 181 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:21:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-19 05:21:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 221. [2023-11-19 05:21:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.8194444444444444) internal successors, (262), 199 states have internal predecessors, (262), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-19 05:21:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 300 transitions. [2023-11-19 05:21:57,066 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 300 transitions. Word has length 12 [2023-11-19 05:21:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:57,067 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 300 transitions. [2023-11-19 05:21:57,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 300 transitions. [2023-11-19 05:21:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:21:57,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:57,068 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:57,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:57,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:57,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:57,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:57,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2029320634, now seen corresponding path program 1 times [2023-11-19 05:21:57,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:57,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158797322] [2023-11-19 05:21:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:57,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:57,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:21:57,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947080053] [2023-11-19 05:21:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:57,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:57,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:57,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:57,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:21:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:57,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:21:57,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:57,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:57,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158797322] [2023-11-19 05:21:57,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:21:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947080053] [2023-11-19 05:21:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947080053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:57,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:57,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:57,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208316752] [2023-11-19 05:21:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:57,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:57,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:57,546 INFO L87 Difference]: Start difference. First operand 221 states and 300 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:58,031 INFO L93 Difference]: Finished difference Result 277 states and 319 transitions. [2023-11-19 05:21:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-11-19 05:21:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:58,035 INFO L225 Difference]: With dead ends: 277 [2023-11-19 05:21:58,035 INFO L226 Difference]: Without dead ends: 263 [2023-11-19 05:21:58,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:58,037 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 83 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:58,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 109 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-19 05:21:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 186. [2023-11-19 05:21:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 114 states have (on average 1.7456140350877194) internal successors, (199), 169 states have internal predecessors, (199), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 05:21:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 227 transitions. [2023-11-19 05:21:58,073 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 227 transitions. Word has length 14 [2023-11-19 05:21:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:58,081 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 227 transitions. [2023-11-19 05:21:58,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:21:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 227 transitions. [2023-11-19 05:21:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:21:58,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:58,084 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:58,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:58,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:58,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash -539874413, now seen corresponding path program 1 times [2023-11-19 05:21:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42839600] [2023-11-19 05:21:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:58,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:21:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982093619] [2023-11-19 05:21:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:58,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:58,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:58,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:21:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:58,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:21:58,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:58,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:58,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42839600] [2023-11-19 05:21:58,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:21:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982093619] [2023-11-19 05:21:58,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982093619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:58,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:58,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765978506] [2023-11-19 05:21:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:58,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:58,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:58,397 INFO L87 Difference]: Start difference. First operand 186 states and 227 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:21:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:58,550 INFO L93 Difference]: Finished difference Result 364 states and 446 transitions. [2023-11-19 05:21:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-19 05:21:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:58,553 INFO L225 Difference]: With dead ends: 364 [2023-11-19 05:21:58,554 INFO L226 Difference]: Without dead ends: 356 [2023-11-19 05:21:58,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:58,556 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 100 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:58,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 177 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:21:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-19 05:21:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 265. [2023-11-19 05:21:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 239 states have internal predecessors, (315), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:21:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 361 transitions. [2023-11-19 05:21:58,583 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 361 transitions. Word has length 19 [2023-11-19 05:21:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:58,583 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 361 transitions. [2023-11-19 05:21:58,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:21:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 361 transitions. [2023-11-19 05:21:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 05:21:58,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:58,585 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:58,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:58,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:58,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:58,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 871733877, now seen corresponding path program 1 times [2023-11-19 05:21:58,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:58,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663006514] [2023-11-19 05:21:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:58,813 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:21:58,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965342274] [2023-11-19 05:21:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:58,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:58,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:58,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:58,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:21:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:58,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:21:58,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:58,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:58,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663006514] [2023-11-19 05:21:58,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:21:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965342274] [2023-11-19 05:21:58,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965342274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:58,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:58,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435761629] [2023-11-19 05:21:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:58,995 INFO L87 Difference]: Start difference. First operand 265 states and 361 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:21:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:59,546 INFO L93 Difference]: Finished difference Result 350 states and 426 transitions. [2023-11-19 05:21:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:21:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-19 05:21:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:59,549 INFO L225 Difference]: With dead ends: 350 [2023-11-19 05:21:59,549 INFO L226 Difference]: Without dead ends: 348 [2023-11-19 05:21:59,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:59,551 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 209 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:59,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 130 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:21:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-19 05:21:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 265. [2023-11-19 05:21:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 184 states have (on average 1.690217391304348) internal successors, (311), 239 states have internal predecessors, (311), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:21:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2023-11-19 05:21:59,574 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 21 [2023-11-19 05:21:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:59,574 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2023-11-19 05:21:59,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:21:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2023-11-19 05:21:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:21:59,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:59,575 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:59,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:59,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:59,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:21:59,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1253946476, now seen corresponding path program 1 times [2023-11-19 05:21:59,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:59,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779363258] [2023-11-19 05:21:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:59,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:59,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:21:59,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018334549] [2023-11-19 05:21:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:59,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:59,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:59,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:59,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:21:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:59,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:21:59,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:21:59,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:59,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779363258] [2023-11-19 05:21:59,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:21:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018334549] [2023-11-19 05:21:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018334549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:59,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:59,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:59,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875672422] [2023-11-19 05:21:59,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:59,950 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:22:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:00,378 INFO L93 Difference]: Finished difference Result 348 states and 422 transitions. [2023-11-19 05:22:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-11-19 05:22:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:00,382 INFO L225 Difference]: With dead ends: 348 [2023-11-19 05:22:00,382 INFO L226 Difference]: Without dead ends: 346 [2023-11-19 05:22:00,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:00,383 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 295 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:00,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 122 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:22:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-19 05:22:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 265. [2023-11-19 05:22:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 184 states have (on average 1.6684782608695652) internal successors, (307), 239 states have internal predecessors, (307), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 353 transitions. [2023-11-19 05:22:00,404 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 353 transitions. Word has length 22 [2023-11-19 05:22:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:00,405 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 353 transitions. [2023-11-19 05:22:00,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:22:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 353 transitions. [2023-11-19 05:22:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 05:22:00,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:00,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:00,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 05:22:00,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:00,620 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:00,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash 217635159, now seen corresponding path program 1 times [2023-11-19 05:22:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:00,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531530886] [2023-11-19 05:22:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:00,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:00,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:00,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903330870] [2023-11-19 05:22:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:00,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:00,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:00,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:22:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:00,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:00,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:22:00,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:00,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531530886] [2023-11-19 05:22:00,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903330870] [2023-11-19 05:22:00,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903330870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819718037] [2023-11-19 05:22:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:00,742 INFO L87 Difference]: Start difference. First operand 265 states and 353 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:22:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:00,956 INFO L93 Difference]: Finished difference Result 352 states and 426 transitions. [2023-11-19 05:22:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:00,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-11-19 05:22:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:00,959 INFO L225 Difference]: With dead ends: 352 [2023-11-19 05:22:00,960 INFO L226 Difference]: Without dead ends: 350 [2023-11-19 05:22:00,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:00,961 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 185 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:00,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:22:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-19 05:22:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 266. [2023-11-19 05:22:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 240 states have internal predecessors, (305), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 351 transitions. [2023-11-19 05:22:00,985 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 351 transitions. Word has length 23 [2023-11-19 05:22:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:00,987 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 351 transitions. [2023-11-19 05:22:00,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:22:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 351 transitions. [2023-11-19 05:22:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 05:22:00,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:00,988 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:01,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:01,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:01,202 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:01,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1843244594, now seen corresponding path program 1 times [2023-11-19 05:22:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:01,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817211226] [2023-11-19 05:22:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:01,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:01,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:01,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623730377] [2023-11-19 05:22:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:01,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:01,213 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:01,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:22:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:01,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:01,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:22:01,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:01,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:01,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817211226] [2023-11-19 05:22:01,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623730377] [2023-11-19 05:22:01,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623730377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:01,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:01,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900510226] [2023-11-19 05:22:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:01,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:01,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:01,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:01,313 INFO L87 Difference]: Start difference. First operand 266 states and 351 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:22:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:01,645 INFO L93 Difference]: Finished difference Result 350 states and 422 transitions. [2023-11-19 05:22:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-19 05:22:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:01,648 INFO L225 Difference]: With dead ends: 350 [2023-11-19 05:22:01,648 INFO L226 Difference]: Without dead ends: 348 [2023-11-19 05:22:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:01,649 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 97 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:01,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 191 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:22:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-19 05:22:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 267. [2023-11-19 05:22:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 186 states have (on average 1.6290322580645162) internal successors, (303), 241 states have internal predecessors, (303), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 349 transitions. [2023-11-19 05:22:01,670 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 349 transitions. Word has length 24 [2023-11-19 05:22:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:01,670 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 349 transitions. [2023-11-19 05:22:01,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:22:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 349 transitions. [2023-11-19 05:22:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:22:01,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:01,671 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-11-19 05:22:01,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:01,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:01,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:01,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -898354950, now seen corresponding path program 1 times [2023-11-19 05:22:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:01,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369374884] [2023-11-19 05:22:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:01,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:01,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:01,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705653779] [2023-11-19 05:22:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:01,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:01,907 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:01,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:22:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:01,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:01,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:02,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:02,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369374884] [2023-11-19 05:22:02,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:02,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705653779] [2023-11-19 05:22:02,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705653779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:02,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:02,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401996870] [2023-11-19 05:22:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:02,074 INFO L87 Difference]: Start difference. First operand 267 states and 349 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:02,489 INFO L93 Difference]: Finished difference Result 311 states and 368 transitions. [2023-11-19 05:22:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:02,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-11-19 05:22:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:02,492 INFO L225 Difference]: With dead ends: 311 [2023-11-19 05:22:02,492 INFO L226 Difference]: Without dead ends: 309 [2023-11-19 05:22:02,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:02,493 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 193 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:02,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 140 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:22:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-19 05:22:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2023-11-19 05:22:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 187 states have (on average 1.6149732620320856) internal successors, (302), 242 states have internal predecessors, (302), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 348 transitions. [2023-11-19 05:22:02,519 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 348 transitions. Word has length 30 [2023-11-19 05:22:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:02,519 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 348 transitions. [2023-11-19 05:22:02,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 348 transitions. [2023-11-19 05:22:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:22:02,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:02,521 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-19 05:22:02,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:02,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:02,736 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:02,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:02,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2079199596, now seen corresponding path program 1 times [2023-11-19 05:22:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307242131] [2023-11-19 05:22:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:02,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:02,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993465966] [2023-11-19 05:22:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:02,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:02,751 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:02,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:22:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:02,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:02,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:02,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:02,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:02,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307242131] [2023-11-19 05:22:02,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:02,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993465966] [2023-11-19 05:22:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993465966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:02,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:02,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996973920] [2023-11-19 05:22:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:02,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:02,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:02,923 INFO L87 Difference]: Start difference. First operand 268 states and 348 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:03,223 INFO L93 Difference]: Finished difference Result 309 states and 365 transitions. [2023-11-19 05:22:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-11-19 05:22:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:03,226 INFO L225 Difference]: With dead ends: 309 [2023-11-19 05:22:03,226 INFO L226 Difference]: Without dead ends: 307 [2023-11-19 05:22:03,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:03,230 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 263 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:03,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 132 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:22:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-19 05:22:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2023-11-19 05:22:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 188 states have (on average 1.601063829787234) internal successors, (301), 243 states have internal predecessors, (301), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 347 transitions. [2023-11-19 05:22:03,266 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 347 transitions. Word has length 31 [2023-11-19 05:22:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:03,269 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 347 transitions. [2023-11-19 05:22:03,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 347 transitions. [2023-11-19 05:22:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 05:22:03,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:03,276 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-19 05:22:03,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:03,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:03,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:03,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash -30677956, now seen corresponding path program 1 times [2023-11-19 05:22:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:03,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354867829] [2023-11-19 05:22:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:03,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:03,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:03,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031445099] [2023-11-19 05:22:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:03,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:03,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:03,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:22:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:03,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:03,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:03,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:03,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354867829] [2023-11-19 05:22:03,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:03,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031445099] [2023-11-19 05:22:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031445099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:03,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261972486] [2023-11-19 05:22:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:03,674 INFO L87 Difference]: Start difference. First operand 269 states and 347 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:03,923 INFO L93 Difference]: Finished difference Result 301 states and 354 transitions. [2023-11-19 05:22:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:03,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-19 05:22:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:03,926 INFO L225 Difference]: With dead ends: 301 [2023-11-19 05:22:03,926 INFO L226 Difference]: Without dead ends: 299 [2023-11-19 05:22:03,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:03,927 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 81 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:03,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 216 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:22:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-19 05:22:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 270. [2023-11-19 05:22:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 189 states have (on average 1.5873015873015872) internal successors, (300), 244 states have internal predecessors, (300), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 346 transitions. [2023-11-19 05:22:03,947 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 346 transitions. Word has length 32 [2023-11-19 05:22:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:03,948 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 346 transitions. [2023-11-19 05:22:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 346 transitions. [2023-11-19 05:22:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 05:22:03,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:03,949 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-19 05:22:03,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:04,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:04,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:04,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -951016554, now seen corresponding path program 1 times [2023-11-19 05:22:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:04,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785936799] [2023-11-19 05:22:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:04,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:04,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010085697] [2023-11-19 05:22:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:04,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:04,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 05:22:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:04,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:04,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:04,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:04,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785936799] [2023-11-19 05:22:04,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010085697] [2023-11-19 05:22:04,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010085697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:04,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:04,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531818495] [2023-11-19 05:22:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:04,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:04,313 INFO L87 Difference]: Start difference. First operand 270 states and 346 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:04,567 INFO L93 Difference]: Finished difference Result 299 states and 351 transitions. [2023-11-19 05:22:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-11-19 05:22:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:04,570 INFO L225 Difference]: With dead ends: 299 [2023-11-19 05:22:04,570 INFO L226 Difference]: Without dead ends: 297 [2023-11-19 05:22:04,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:04,571 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 79 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:04,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 219 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:22:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-19 05:22:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 271. [2023-11-19 05:22:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 190 states have (on average 1.5736842105263158) internal successors, (299), 245 states have internal predecessors, (299), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 345 transitions. [2023-11-19 05:22:04,591 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 345 transitions. Word has length 33 [2023-11-19 05:22:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:04,592 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 345 transitions. [2023-11-19 05:22:04,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:22:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 345 transitions. [2023-11-19 05:22:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 05:22:04,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:04,593 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2023-11-19 05:22:04,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:04,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:22:04,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:04,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2089665841, now seen corresponding path program 1 times [2023-11-19 05:22:04,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:04,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036507737] [2023-11-19 05:22:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:04,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:04,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402538330] [2023-11-19 05:22:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:04,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:04,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:04,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 05:22:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:04,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:22:04,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:04,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:04,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:04,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036507737] [2023-11-19 05:22:04,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:04,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402538330] [2023-11-19 05:22:04,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402538330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:04,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:04,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:22:04,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125211003] [2023-11-19 05:22:04,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:22:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:04,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:22:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:04,893 INFO L87 Difference]: Start difference. First operand 271 states and 345 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:22:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:04,939 INFO L93 Difference]: Finished difference Result 271 states and 345 transitions. [2023-11-19 05:22:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:22:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2023-11-19 05:22:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:04,942 INFO L225 Difference]: With dead ends: 271 [2023-11-19 05:22:04,942 INFO L226 Difference]: Without dead ends: 269 [2023-11-19 05:22:04,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:04,943 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:04,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:22:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-19 05:22:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-19 05:22:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 190 states have (on average 1.5421052631578946) internal successors, (293), 243 states have internal predecessors, (293), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 339 transitions. [2023-11-19 05:22:04,963 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 339 transitions. Word has length 38 [2023-11-19 05:22:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:04,964 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 339 transitions. [2023-11-19 05:22:04,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:22:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 339 transitions. [2023-11-19 05:22:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:22:04,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:04,965 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2023-11-19 05:22:04,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:05,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 05:22:05,186 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:05,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash 355131756, now seen corresponding path program 1 times [2023-11-19 05:22:05,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:05,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329322727] [2023-11-19 05:22:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:05,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:05,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:05,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112229818] [2023-11-19 05:22:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:05,206 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:05,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 05:22:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:05,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:22:05,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:05,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:05,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329322727] [2023-11-19 05:22:05,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112229818] [2023-11-19 05:22:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112229818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:22:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746171696] [2023-11-19 05:22:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:22:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:22:05,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:05,270 INFO L87 Difference]: Start difference. First operand 269 states and 339 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:22:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:05,329 INFO L93 Difference]: Finished difference Result 269 states and 339 transitions. [2023-11-19 05:22:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:22:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 39 [2023-11-19 05:22:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:05,332 INFO L225 Difference]: With dead ends: 269 [2023-11-19 05:22:05,332 INFO L226 Difference]: Without dead ends: 267 [2023-11-19 05:22:05,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:05,333 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 50 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:05,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 183 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:22:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-19 05:22:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2023-11-19 05:22:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 190 states have (on average 1.5) internal successors, (285), 241 states have internal predecessors, (285), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 331 transitions. [2023-11-19 05:22:05,352 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 331 transitions. Word has length 39 [2023-11-19 05:22:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:05,353 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 331 transitions. [2023-11-19 05:22:05,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:22:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 331 transitions. [2023-11-19 05:22:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:22:05,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:05,354 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2023-11-19 05:22:05,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 05:22:05,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:05,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1875775617, now seen corresponding path program 1 times [2023-11-19 05:22:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585359477] [2023-11-19 05:22:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:05,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352544323] [2023-11-19 05:22:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:05,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:05,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:05,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 05:22:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:05,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:22:05,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:05,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:05,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585359477] [2023-11-19 05:22:05,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352544323] [2023-11-19 05:22:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352544323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:05,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:05,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415398343] [2023-11-19 05:22:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:05,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:05,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:05,786 INFO L87 Difference]: Start difference. First operand 267 states and 331 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:06,425 INFO L93 Difference]: Finished difference Result 295 states and 359 transitions. [2023-11-19 05:22:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:06,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-11-19 05:22:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:06,429 INFO L225 Difference]: With dead ends: 295 [2023-11-19 05:22:06,429 INFO L226 Difference]: Without dead ends: 294 [2023-11-19 05:22:06,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:22:06,430 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 203 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:06,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 131 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:22:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-19 05:22:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 267. [2023-11-19 05:22:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 190 states have (on average 1.4947368421052631) internal successors, (284), 241 states have internal predecessors, (284), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2023-11-19 05:22:06,452 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 40 [2023-11-19 05:22:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:06,453 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2023-11-19 05:22:06,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2023-11-19 05:22:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:22:06,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:06,455 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2023-11-19 05:22:06,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 05:22:06,668 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:06,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1875789519, now seen corresponding path program 1 times [2023-11-19 05:22:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:06,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925373252] [2023-11-19 05:22:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:06,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:06,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:06,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6682315] [2023-11-19 05:22:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:06,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:06,692 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:06,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 05:22:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:06,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:22:06,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:06,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:06,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:06,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925373252] [2023-11-19 05:22:06,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:06,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6682315] [2023-11-19 05:22:06,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6682315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:06,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:06,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65839732] [2023-11-19 05:22:06,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:06,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:06,894 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:07,640 INFO L93 Difference]: Finished difference Result 294 states and 358 transitions. [2023-11-19 05:22:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-11-19 05:22:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:07,644 INFO L225 Difference]: With dead ends: 294 [2023-11-19 05:22:07,644 INFO L226 Difference]: Without dead ends: 293 [2023-11-19 05:22:07,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:22:07,645 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 201 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:07,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 132 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:22:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-19 05:22:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2023-11-19 05:22:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 192 states have (on average 1.4895833333333333) internal successors, (286), 243 states have internal predecessors, (286), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 332 transitions. [2023-11-19 05:22:07,667 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 332 transitions. Word has length 40 [2023-11-19 05:22:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:07,667 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 332 transitions. [2023-11-19 05:22:07,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 332 transitions. [2023-11-19 05:22:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:22:07,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:07,669 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:07,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:07,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 05:22:07,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:07,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash 588192498, now seen corresponding path program 1 times [2023-11-19 05:22:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661643139] [2023-11-19 05:22:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:07,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:07,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411085453] [2023-11-19 05:22:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:07,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:07,896 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:07,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 05:22:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:07,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:22:07,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:08,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:08,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:08,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661643139] [2023-11-19 05:22:08,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:08,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411085453] [2023-11-19 05:22:08,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411085453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:08,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:08,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:22:08,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150155326] [2023-11-19 05:22:08,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:08,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:22:08,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:08,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:22:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:08,059 INFO L87 Difference]: Start difference. First operand 269 states and 332 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:08,168 INFO L93 Difference]: Finished difference Result 269 states and 332 transitions. [2023-11-19 05:22:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:22:08,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-11-19 05:22:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:08,171 INFO L225 Difference]: With dead ends: 269 [2023-11-19 05:22:08,171 INFO L226 Difference]: Without dead ends: 267 [2023-11-19 05:22:08,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:08,172 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 83 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:08,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 64 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:22:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-19 05:22:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2023-11-19 05:22:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 192 states have (on average 1.46875) internal successors, (282), 241 states have internal predecessors, (282), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 328 transitions. [2023-11-19 05:22:08,194 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 328 transitions. Word has length 43 [2023-11-19 05:22:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:08,194 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 328 transitions. [2023-11-19 05:22:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 328 transitions. [2023-11-19 05:22:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:22:08,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:08,196 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:08,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:08,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 05:22:08,417 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:08,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:08,417 INFO L85 PathProgramCache]: Analyzing trace with hash 174024114, now seen corresponding path program 1 times [2023-11-19 05:22:08,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:08,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228942802] [2023-11-19 05:22:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:08,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:08,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194678252] [2023-11-19 05:22:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:08,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:08,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:08,427 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:08,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 05:22:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:08,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:22:08,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:08,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:08,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:08,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228942802] [2023-11-19 05:22:08,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:08,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194678252] [2023-11-19 05:22:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194678252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:08,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:22:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543683948] [2023-11-19 05:22:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:22:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:22:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:08,579 INFO L87 Difference]: Start difference. First operand 267 states and 328 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:08,959 INFO L93 Difference]: Finished difference Result 344 states and 394 transitions. [2023-11-19 05:22:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:22:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-11-19 05:22:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:08,962 INFO L225 Difference]: With dead ends: 344 [2023-11-19 05:22:08,962 INFO L226 Difference]: Without dead ends: 342 [2023-11-19 05:22:08,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:22:08,963 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 65 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:08,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 123 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:22:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-19 05:22:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 275. [2023-11-19 05:22:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 200 states have (on average 1.46) internal successors, (292), 249 states have internal predecessors, (292), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:22:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 338 transitions. [2023-11-19 05:22:08,986 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 338 transitions. Word has length 43 [2023-11-19 05:22:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:08,986 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 338 transitions. [2023-11-19 05:22:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:22:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 338 transitions. [2023-11-19 05:22:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:22:08,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:08,988 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:09,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:09,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:09,208 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:09,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash -623745915, now seen corresponding path program 1 times [2023-11-19 05:22:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:09,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133483199] [2023-11-19 05:22:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:09,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:09,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579220082] [2023-11-19 05:22:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:09,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:09,221 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:09,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 05:22:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:09,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:22:09,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:22:09,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:09,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133483199] [2023-11-19 05:22:09,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579220082] [2023-11-19 05:22:09,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579220082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998202747] [2023-11-19 05:22:09,683 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-11-19 05:22:09,683 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:09,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:09,693 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:09,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:14,686 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-19 05:22:14,688 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-19 05:22:14,733 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [998202747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:17,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:22:17,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3] total 18 [2023-11-19 05:22:17,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024869254] [2023-11-19 05:22:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:17,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 05:22:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 05:22:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:22:17,161 INFO L87 Difference]: Start difference. First operand 275 states and 338 transitions. Second operand has 17 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:22:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:20,980 INFO L93 Difference]: Finished difference Result 340 states and 392 transitions. [2023-11-19 05:22:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 05:22:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2023-11-19 05:22:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:20,982 INFO L225 Difference]: With dead ends: 340 [2023-11-19 05:22:20,983 INFO L226 Difference]: Without dead ends: 252 [2023-11-19 05:22:20,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:22:20,984 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 360 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:20,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 109 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 05:22:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-19 05:22:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2023-11-19 05:22:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 176 states have (on average 1.4204545454545454) internal successors, (250), 225 states have internal predecessors, (250), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 05:22:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 290 transitions. [2023-11-19 05:22:21,011 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 290 transitions. Word has length 46 [2023-11-19 05:22:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:21,011 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 290 transitions. [2023-11-19 05:22:21,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:22:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 290 transitions. [2023-11-19 05:22:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:22:21,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:21,013 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:21,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:21,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:21,234 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:21,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash -961247938, now seen corresponding path program 1 times [2023-11-19 05:22:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:21,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619772161] [2023-11-19 05:22:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:21,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:21,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:21,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509327709] [2023-11-19 05:22:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:21,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:21,251 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:21,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-19 05:22:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:21,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 05:22:21,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:22:21,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:23,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619772161] [2023-11-19 05:22:23,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509327709] [2023-11-19 05:22:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509327709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348635576] [2023-11-19 05:22:23,741 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-11-19 05:22:23,741 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:23,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:23,742 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:23,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:27,146 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-19 05:22:27,148 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-19 05:22:27,186 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:30,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14270#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1| 2147483647) (= |ULTIMATE.start_main_~p~0#1| 1) (<= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) 9223372036854775809) 0) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 0) (<= |ULTIMATE.start_main_~b~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= 0 (+ 9223372036854775808 |ULTIMATE.start_main_~r~0#1|)) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (= |ULTIMATE.start_main_~s~0#1| 1))' at error location [2023-11-19 05:22:30,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:22:30,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:22:30,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-19 05:22:30,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780820967] [2023-11-19 05:22:30,799 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 05:22:30,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:22:30,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:30,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:22:30,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=493, Unknown=1, NotChecked=0, Total=600 [2023-11-19 05:22:30,801 INFO L87 Difference]: Start difference. First operand 248 states and 290 transitions. Second operand has 7 states, 4 states have (on average 10.0) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:22:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:31,332 INFO L93 Difference]: Finished difference Result 426 states and 500 transitions. [2023-11-19 05:22:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:22:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 10.0) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2023-11-19 05:22:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:31,336 INFO L225 Difference]: With dead ends: 426 [2023-11-19 05:22:31,336 INFO L226 Difference]: Without dead ends: 424 [2023-11-19 05:22:31,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 17 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=106, Invalid=493, Unknown=1, NotChecked=0, Total=600 [2023-11-19 05:22:31,338 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 328 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:31,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 210 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:22:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-19 05:22:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 320. [2023-11-19 05:22:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 240 states have (on average 1.4541666666666666) internal successors, (349), 289 states have internal predecessors, (349), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 05:22:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 405 transitions. [2023-11-19 05:22:31,372 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 405 transitions. Word has length 55 [2023-11-19 05:22:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:31,372 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 405 transitions. [2023-11-19 05:22:31,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 10.0) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:22:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 405 transitions. [2023-11-19 05:22:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 05:22:31,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:31,374 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:31,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:31,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 05:22:31,594 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:31,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 266085055, now seen corresponding path program 1 times [2023-11-19 05:22:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:31,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604014438] [2023-11-19 05:22:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:31,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:31,605 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087999869] [2023-11-19 05:22:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:31,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:31,607 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:31,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 05:22:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:31,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 05:22:31,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:22:31,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:32,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604014438] [2023-11-19 05:22:32,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087999869] [2023-11-19 05:22:32,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087999869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515129060] [2023-11-19 05:22:32,340 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-11-19 05:22:32,340 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:32,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:32,341 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:32,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:35,102 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-19 05:22:35,103 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2023-11-19 05:22:35,127 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1515129060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:37,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:22:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 21 [2023-11-19 05:22:37,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456565858] [2023-11-19 05:22:37,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:37,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 05:22:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 05:22:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:22:37,148 INFO L87 Difference]: Start difference. First operand 320 states and 405 transitions. Second operand has 17 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:22:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:40,390 INFO L93 Difference]: Finished difference Result 343 states and 410 transitions. [2023-11-19 05:22:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 05:22:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2023-11-19 05:22:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:40,393 INFO L225 Difference]: With dead ends: 343 [2023-11-19 05:22:40,393 INFO L226 Difference]: Without dead ends: 307 [2023-11-19 05:22:40,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 18 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 05:22:40,395 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 706 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 134 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 05:22:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-19 05:22:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 297. [2023-11-19 05:22:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 220 states have (on average 1.3863636363636365) internal successors, (305), 269 states have internal predecessors, (305), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-19 05:22:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 355 transitions. [2023-11-19 05:22:40,427 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 355 transitions. Word has length 56 [2023-11-19 05:22:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:40,428 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 355 transitions. [2023-11-19 05:22:40,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:22:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 355 transitions. [2023-11-19 05:22:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 05:22:40,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:40,429 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 05:22:40,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:40,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 05:22:40,644 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-11-19 05:22:40,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:40,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1866433453, now seen corresponding path program 1 times [2023-11-19 05:22:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305115911] [2023-11-19 05:22:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:40,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:22:40,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402775526] [2023-11-19 05:22:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:40,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:40,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:40,661 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:40,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef0f9ca-de43-46cb-a8d0-201bcb96719a/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-19 05:22:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:40,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:22:40,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:22:40,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:22:40,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305115911] [2023-11-19 05:22:40,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:22:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402775526] [2023-11-19 05:22:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402775526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:22:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680389634] [2023-11-19 05:22:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:40,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:40,930 INFO L87 Difference]: Start difference. First operand 297 states and 355 transitions. Second operand has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)