./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/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_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/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_2e396dad-46e5-4627-a5f2-dbaff6268960/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 2d26d8e14d33b8c29eaf9ffa7603dd26966f962451e6c0726b154a73bf65f3d2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:28,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:28,997 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:48:29,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:29,002 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:29,029 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:29,030 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:29,031 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:29,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:29,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:29,032 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:29,033 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:29,034 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:29,034 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:29,035 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:29,035 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:29,036 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:29,036 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:29,037 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:29,038 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:29,038 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:29,039 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:29,040 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:29,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:29,041 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:29,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:29,041 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:29,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:29,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:29,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:29,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:29,043 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:48:29,044 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:48:29,044 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:29,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:29,044 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:29,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:29,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:29,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:29,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:29,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:29,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:29,046 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:29,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:29,047 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:29,047 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:29,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:29,047 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_2e396dad-46e5-4627-a5f2-dbaff6268960/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d26d8e14d33b8c29eaf9ffa7603dd26966f962451e6c0726b154a73bf65f3d2 [2023-11-19 04:48:29,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:29,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:29,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:29,439 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:29,439 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:29,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c [2023-11-19 04:48:32,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:32,754 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:32,755 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound50.c [2023-11-19 04:48:32,763 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/data/6ed64903b/9d2fcba704a74a7497447ae558982d6f/FLAG62611d4fb [2023-11-19 04:48:32,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/data/6ed64903b/9d2fcba704a74a7497447ae558982d6f [2023-11-19 04:48:32,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:32,782 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:32,783 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:32,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:32,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:32,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:32" (1/1) ... [2023-11-19 04:48:32,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a4dc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:32, skipping insertion in model container [2023-11-19 04:48:32,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:32" (1/1) ... [2023-11-19 04:48:32,820 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:33,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:33,046 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:33,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:33,083 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:33,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33 WrapperNode [2023-11-19 04:48:33,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:33,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:33,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:33,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:33,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,135 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2023-11-19 04:48:33,135 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:33,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:33,136 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:33,137 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:33,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,153 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,157 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:33,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:33,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:33,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:33,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:33,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:33,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:48:33,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:33,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:48:33,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:48:33,346 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:33,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:33,899 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:33,944 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:33,945 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:48:33,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:33 BoogieIcfgContainer [2023-11-19 04:48:33,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:33,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:33,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:33,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:33,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:32" (1/3) ... [2023-11-19 04:48:33,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786864d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:33, skipping insertion in model container [2023-11-19 04:48:33,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33" (2/3) ... [2023-11-19 04:48:33,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786864d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:33, skipping insertion in model container [2023-11-19 04:48:33,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:33" (3/3) ... [2023-11-19 04:48:33,962 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.c [2023-11-19 04:48:33,982 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:33,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2023-11-19 04:48:34,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:34,045 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;@32e4ac34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:34,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2023-11-19 04:48:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 125 states have internal predecessors, (129), 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 04:48:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:48:34,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:34,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:34,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:34,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1031225981, now seen corresponding path program 1 times [2023-11-19 04:48:34,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:34,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574107552] [2023-11-19 04:48:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:34,306 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 04:48:34,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:34,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574107552] [2023-11-19 04:48:34,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574107552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:34,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829608058] [2023-11-19 04:48:34,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:34,379 INFO L87 Difference]: Start difference. First operand has 137 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 125 states have internal predecessors, (129), 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 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:48:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:34,465 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2023-11-19 04:48:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:48:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:34,477 INFO L225 Difference]: With dead ends: 203 [2023-11-19 04:48:34,477 INFO L226 Difference]: Without dead ends: 138 [2023-11-19 04:48:34,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 04:48:34,483 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 7 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:34,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 407 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-19 04:48:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-19 04:48:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 70 states have (on average 1.8571428571428572) internal successors, (130), 127 states have internal predecessors, (130), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:48:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2023-11-19 04:48:34,535 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 10 [2023-11-19 04:48:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:34,536 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2023-11-19 04:48:34,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:48:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2023-11-19 04:48:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:48:34,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:34,538 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:34,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:34,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:34,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash -647824463, now seen corresponding path program 1 times [2023-11-19 04:48:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:34,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840912526] [2023-11-19 04:48:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:34,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:34,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667243468] [2023-11-19 04:48:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:34,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:34,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:34,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:34,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:34,684 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 04:48:34,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:34,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840912526] [2023-11-19 04:48:34,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667243468] [2023-11-19 04:48:34,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667243468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:34,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:34,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702256856] [2023-11-19 04:48:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:34,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:34,689 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 04:48:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:34,975 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2023-11-19 04:48:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:34,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 13 [2023-11-19 04:48:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:34,980 INFO L225 Difference]: With dead ends: 254 [2023-11-19 04:48:34,980 INFO L226 Difference]: Without dead ends: 250 [2023-11-19 04:48:34,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 04:48:34,983 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 105 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:34,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 170 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-19 04:48:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 176. [2023-11-19 04:48:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 103 states have (on average 1.8640776699029127) internal successors, (192), 160 states have internal predecessors, (192), 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 04:48:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2023-11-19 04:48:35,013 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 13 [2023-11-19 04:48:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:35,014 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2023-11-19 04:48:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 04:48:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2023-11-19 04:48:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:48:35,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:35,015 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:35,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:35,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 04:48:35,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:35,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash 210950675, now seen corresponding path program 1 times [2023-11-19 04:48:35,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:35,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247376295] [2023-11-19 04:48:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:35,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:35,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:35,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708309188] [2023-11-19 04:48:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:35,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:35,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:35,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:48:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:35,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:48:35,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:35,392 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 04:48:35,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:35,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:35,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247376295] [2023-11-19 04:48:35,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:35,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708309188] [2023-11-19 04:48:35,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708309188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:35,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:35,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561912296] [2023-11-19 04:48:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:35,398 INFO L87 Difference]: Start difference. First operand 176 states and 218 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 04:48:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:35,590 INFO L93 Difference]: Finished difference Result 298 states and 348 transitions. [2023-11-19 04:48:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:35,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 15 [2023-11-19 04:48:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:35,595 INFO L225 Difference]: With dead ends: 298 [2023-11-19 04:48:35,595 INFO L226 Difference]: Without dead ends: 290 [2023-11-19 04:48:35,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 04:48:35,601 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 103 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 213 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 04:48:35,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 213 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-19 04:48:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 232. [2023-11-19 04:48:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 153 states have (on average 1.8104575163398693) internal successors, (277), 210 states have internal predecessors, (277), 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 04:48:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 315 transitions. [2023-11-19 04:48:35,659 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 315 transitions. Word has length 15 [2023-11-19 04:48:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:35,659 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 315 transitions. [2023-11-19 04:48:35,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 04:48:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 315 transitions. [2023-11-19 04:48:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:48:35,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:35,661 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:35,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:35,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 04:48:35,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:35,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash 860137589, now seen corresponding path program 1 times [2023-11-19 04:48:35,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:35,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079985465] [2023-11-19 04:48:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:35,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:35,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558834931] [2023-11-19 04:48:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:35,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:35,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:35,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:35,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:35,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:48:35,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:36,051 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 04:48:36,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:36,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:36,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079985465] [2023-11-19 04:48:36,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:36,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558834931] [2023-11-19 04:48:36,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558834931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469671205] [2023-11-19 04:48:36,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:36,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:36,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:36,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:36,055 INFO L87 Difference]: Start difference. First operand 232 states and 315 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 04:48:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:36,323 INFO L93 Difference]: Finished difference Result 290 states and 334 transitions. [2023-11-19 04:48:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:36,324 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), 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 17 [2023-11-19 04:48:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:36,326 INFO L225 Difference]: With dead ends: 290 [2023-11-19 04:48:36,326 INFO L226 Difference]: Without dead ends: 276 [2023-11-19 04:48:36,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 04:48:36,331 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 86 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:36,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 138 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-11-19 04:48:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 198. [2023-11-19 04:48:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 181 states have internal predecessors, (215), 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 04:48:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 243 transitions. [2023-11-19 04:48:36,358 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 243 transitions. Word has length 17 [2023-11-19 04:48:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:36,358 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 243 transitions. [2023-11-19 04:48:36,359 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), 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 04:48:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 243 transitions. [2023-11-19 04:48:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 04:48:36,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:36,360 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 04:48:36,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 04:48:36,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:36,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1328915063, now seen corresponding path program 1 times [2023-11-19 04:48:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:36,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881090285] [2023-11-19 04:48:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:36,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:36,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:36,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823067505] [2023-11-19 04:48:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:36,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:36,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:36,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:48:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:36,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:48:36,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:36,731 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 04:48:36,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:36,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881090285] [2023-11-19 04:48:36,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823067505] [2023-11-19 04:48:36,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823067505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:36,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:36,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54060189] [2023-11-19 04:48:36,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:36,735 INFO L87 Difference]: Start difference. First operand 198 states and 243 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 04:48:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:36,909 INFO L93 Difference]: Finished difference Result 380 states and 467 transitions. [2023-11-19 04:48:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 04:48:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:36,918 INFO L225 Difference]: With dead ends: 380 [2023-11-19 04:48:36,919 INFO L226 Difference]: Without dead ends: 372 [2023-11-19 04:48:36,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 04:48:36,921 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 103 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 206 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 04:48:36,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 206 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-19 04:48:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 279. [2023-11-19 04:48:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 196 states have (on average 1.7142857142857142) internal successors, (336), 253 states have internal predecessors, (336), 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 04:48:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 382 transitions. [2023-11-19 04:48:36,951 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 382 transitions. Word has length 22 [2023-11-19 04:48:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:36,952 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 382 transitions. [2023-11-19 04:48:36,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 04:48:36,952 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 382 transitions. [2023-11-19 04:48:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:48:36,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:36,954 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 04:48:36,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:37,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:37,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:37,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:37,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1482086517, now seen corresponding path program 1 times [2023-11-19 04:48:37,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:37,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098786017] [2023-11-19 04:48:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:37,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:37,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:37,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655806146] [2023-11-19 04:48:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:37,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:37,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:37,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:37,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:48:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:37,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:37,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:37,409 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 04:48:37,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:37,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098786017] [2023-11-19 04:48:37,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655806146] [2023-11-19 04:48:37,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655806146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:37,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:37,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:37,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892655365] [2023-11-19 04:48:37,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:37,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:37,414 INFO L87 Difference]: Start difference. First operand 279 states and 382 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 04:48:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:37,929 INFO L93 Difference]: Finished difference Result 366 states and 447 transitions. [2023-11-19 04:48:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:37,929 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 04:48:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:37,932 INFO L225 Difference]: With dead ends: 366 [2023-11-19 04:48:37,932 INFO L226 Difference]: Without dead ends: 364 [2023-11-19 04:48:37,933 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 04:48:37,934 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 218 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 154 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 04:48:37,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 154 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:48:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-19 04:48:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 279. [2023-11-19 04:48:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 196 states have (on average 1.6938775510204083) internal successors, (332), 253 states have internal predecessors, (332), 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 04:48:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 378 transitions. [2023-11-19 04:48:37,952 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 378 transitions. Word has length 24 [2023-11-19 04:48:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:37,952 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 378 transitions. [2023-11-19 04:48:37,952 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 04:48:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 378 transitions. [2023-11-19 04:48:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:48:37,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:37,953 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, 1] [2023-11-19 04:48:37,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 04:48:38,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:48:38,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:38,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1299958299, now seen corresponding path program 1 times [2023-11-19 04:48:38,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:38,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050243739] [2023-11-19 04:48:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:38,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:38,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:38,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185298475] [2023-11-19 04:48:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:38,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:38,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:38,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:38,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:48:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:38,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:38,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:38,305 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 04:48:38,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:38,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:38,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050243739] [2023-11-19 04:48:38,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:38,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185298475] [2023-11-19 04:48:38,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185298475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:38,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:38,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983884270] [2023-11-19 04:48:38,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:38,330 INFO L87 Difference]: Start difference. First operand 279 states and 378 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 04:48:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:38,783 INFO L93 Difference]: Finished difference Result 364 states and 443 transitions. [2023-11-19 04:48:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:38,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 25 [2023-11-19 04:48:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:38,787 INFO L225 Difference]: With dead ends: 364 [2023-11-19 04:48:38,787 INFO L226 Difference]: Without dead ends: 362 [2023-11-19 04:48:38,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 04:48:38,788 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 215 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:38,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 148 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:48:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-19 04:48:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 279. [2023-11-19 04:48:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 196 states have (on average 1.6734693877551021) internal successors, (328), 253 states have internal predecessors, (328), 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 04:48:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 374 transitions. [2023-11-19 04:48:38,806 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 374 transitions. Word has length 25 [2023-11-19 04:48:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:38,806 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 374 transitions. [2023-11-19 04:48:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 04:48:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 374 transitions. [2023-11-19 04:48:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:48:38,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:38,808 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, 1, 1] [2023-11-19 04:48:38,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:39,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 04:48:39,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:39,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1644001677, now seen corresponding path program 1 times [2023-11-19 04:48:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:39,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492319767] [2023-11-19 04:48:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:39,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:39,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949523638] [2023-11-19 04:48:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:39,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:39,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:39,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:48:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:39,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:39,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:39,132 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 04:48:39,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:39,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492319767] [2023-11-19 04:48:39,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:39,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949523638] [2023-11-19 04:48:39,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949523638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:39,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:39,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:39,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58595268] [2023-11-19 04:48:39,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:39,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:39,135 INFO L87 Difference]: Start difference. First operand 279 states and 374 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 04:48:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:39,387 INFO L93 Difference]: Finished difference Result 368 states and 447 transitions. [2023-11-19 04:48:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 26 [2023-11-19 04:48:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:39,391 INFO L225 Difference]: With dead ends: 368 [2023-11-19 04:48:39,391 INFO L226 Difference]: Without dead ends: 366 [2023-11-19 04:48:39,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 04:48:39,392 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:39,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 209 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:39,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-19 04:48:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 280. [2023-11-19 04:48:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 197 states have (on average 1.6548223350253808) internal successors, (326), 254 states have internal predecessors, (326), 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 04:48:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 372 transitions. [2023-11-19 04:48:39,411 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 372 transitions. Word has length 26 [2023-11-19 04:48:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:39,411 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 372 transitions. [2023-11-19 04:48:39,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 04:48:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 372 transitions. [2023-11-19 04:48:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:48:39,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:39,413 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, 1, 1, 1] [2023-11-19 04:48:39,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 04:48:39,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:39,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash -575555491, now seen corresponding path program 1 times [2023-11-19 04:48:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:39,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415685969] [2023-11-19 04:48:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:39,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:39,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120147676] [2023-11-19 04:48:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:39,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:39,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:39,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:48:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:39,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:39,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:39,738 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 04:48:39,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:39,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415685969] [2023-11-19 04:48:39,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120147676] [2023-11-19 04:48:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120147676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:39,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138525398] [2023-11-19 04:48:39,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:39,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:39,743 INFO L87 Difference]: Start difference. First operand 280 states and 372 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, (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 04:48:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:39,935 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2023-11-19 04:48:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:39,936 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, (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 27 [2023-11-19 04:48:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:39,940 INFO L225 Difference]: With dead ends: 366 [2023-11-19 04:48:39,940 INFO L226 Difference]: Without dead ends: 364 [2023-11-19 04:48:39,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 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 04:48:39,943 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 189 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:39,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 207 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-19 04:48:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 281. [2023-11-19 04:48:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 198 states have (on average 1.6363636363636365) internal successors, (324), 255 states have internal predecessors, (324), 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 04:48:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2023-11-19 04:48:39,962 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 27 [2023-11-19 04:48:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2023-11-19 04:48:39,963 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, (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 04:48:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2023-11-19 04:48:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 04:48:39,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:39,966 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 04:48:39,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:40,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:48:40,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:40,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1070283305, now seen corresponding path program 1 times [2023-11-19 04:48:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:40,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138278154] [2023-11-19 04:48:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:40,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015613726] [2023-11-19 04:48:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:40,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:40,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:40,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:48:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:40,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:40,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:40,379 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 04:48:40,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:40,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138278154] [2023-11-19 04:48:40,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015613726] [2023-11-19 04:48:40,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015613726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:40,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:40,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:40,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971230152] [2023-11-19 04:48:40,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:40,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:40,382 INFO L87 Difference]: Start difference. First operand 281 states and 370 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 04:48:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:41,017 INFO L93 Difference]: Finished difference Result 327 states and 389 transitions. [2023-11-19 04:48:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:41,018 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 04:48:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:41,020 INFO L225 Difference]: With dead ends: 327 [2023-11-19 04:48:41,021 INFO L226 Difference]: Without dead ends: 325 [2023-11-19 04:48:41,021 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 04:48:41,022 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 202 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:41,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:48:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-19 04:48:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2023-11-19 04:48:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 199 states have (on average 1.6231155778894473) internal successors, (323), 256 states have internal predecessors, (323), 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 04:48:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 369 transitions. [2023-11-19 04:48:41,042 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 369 transitions. Word has length 33 [2023-11-19 04:48:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:41,042 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 369 transitions. [2023-11-19 04:48:41,042 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 04:48:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 369 transitions. [2023-11-19 04:48:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:48:41,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:41,046 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, 1] [2023-11-19 04:48:41,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:41,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:48:41,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:41,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1180955830, now seen corresponding path program 1 times [2023-11-19 04:48:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:41,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601065092] [2023-11-19 04:48:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:41,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373612340] [2023-11-19 04:48:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:41,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:41,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:48:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:41,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:41,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:41,445 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 04:48:41,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:41,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601065092] [2023-11-19 04:48:41,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373612340] [2023-11-19 04:48:41,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373612340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:41,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:41,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052972143] [2023-11-19 04:48:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:41,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:41,448 INFO L87 Difference]: Start difference. First operand 282 states and 369 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 04:48:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:41,647 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2023-11-19 04:48:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 34 [2023-11-19 04:48:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:41,651 INFO L225 Difference]: With dead ends: 325 [2023-11-19 04:48:41,651 INFO L226 Difference]: Without dead ends: 323 [2023-11-19 04:48:41,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 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 04:48:41,652 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 272 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:41,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 147 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-19 04:48:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 283. [2023-11-19 04:48:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 200 states have (on average 1.61) internal successors, (322), 257 states have internal predecessors, (322), 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 04:48:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 368 transitions. [2023-11-19 04:48:41,675 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 368 transitions. Word has length 34 [2023-11-19 04:48:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:41,675 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 368 transitions. [2023-11-19 04:48:41,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 04:48:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 368 transitions. [2023-11-19 04:48:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:48:41,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:41,679 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, 1, 1] [2023-11-19 04:48:41,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:41,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:48:41,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:41,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2045075019, now seen corresponding path program 1 times [2023-11-19 04:48:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:41,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656371375] [2023-11-19 04:48:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:41,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:41,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434648262] [2023-11-19 04:48:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:41,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:41,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 04:48:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:41,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:41,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:42,021 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 04:48:42,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:42,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656371375] [2023-11-19 04:48:42,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434648262] [2023-11-19 04:48:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434648262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:42,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347319593] [2023-11-19 04:48:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:42,023 INFO L87 Difference]: Start difference. First operand 283 states and 368 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 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 04:48:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:42,277 INFO L93 Difference]: Finished difference Result 317 states and 375 transitions. [2023-11-19 04:48:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 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 35 [2023-11-19 04:48:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:42,280 INFO L225 Difference]: With dead ends: 317 [2023-11-19 04:48:42,280 INFO L226 Difference]: Without dead ends: 315 [2023-11-19 04:48:42,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 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 04:48:42,281 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 87 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 277 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 04:48:42,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 277 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-19 04:48:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2023-11-19 04:48:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 201 states have (on average 1.5970149253731343) internal successors, (321), 258 states have internal predecessors, (321), 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 04:48:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 367 transitions. [2023-11-19 04:48:42,299 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 367 transitions. Word has length 35 [2023-11-19 04:48:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:42,299 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 367 transitions. [2023-11-19 04:48:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 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 04:48:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 367 transitions. [2023-11-19 04:48:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 04:48:42,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:42,300 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, 1, 1, 1] [2023-11-19 04:48:42,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:42,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 04:48:42,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:42,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:42,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1027183764, now seen corresponding path program 1 times [2023-11-19 04:48:42,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:42,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318780819] [2023-11-19 04:48:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:42,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90801765] [2023-11-19 04:48:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:42,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:42,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:42,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 04:48:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:42,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:42,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:42,618 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 04:48:42,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:42,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318780819] [2023-11-19 04:48:42,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90801765] [2023-11-19 04:48:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90801765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:42,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:42,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:42,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746820180] [2023-11-19 04:48:42,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:42,622 INFO L87 Difference]: Start difference. First operand 284 states and 367 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 04:48:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:42,794 INFO L93 Difference]: Finished difference Result 315 states and 372 transitions. [2023-11-19 04:48:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 36 [2023-11-19 04:48:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:42,797 INFO L225 Difference]: With dead ends: 315 [2023-11-19 04:48:42,797 INFO L226 Difference]: Without dead ends: 313 [2023-11-19 04:48:42,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 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 04:48:42,798 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 151 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:42,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 202 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-19 04:48:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 285. [2023-11-19 04:48:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 202 states have (on average 1.5841584158415842) internal successors, (320), 259 states have internal predecessors, (320), 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 04:48:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 366 transitions. [2023-11-19 04:48:42,821 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 366 transitions. Word has length 36 [2023-11-19 04:48:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:42,821 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 366 transitions. [2023-11-19 04:48:42,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 04:48:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 366 transitions. [2023-11-19 04:48:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 04:48:42,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:42,823 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] [2023-11-19 04:48:42,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:43,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 04:48:43,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:43,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1678918112, now seen corresponding path program 1 times [2023-11-19 04:48:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115069504] [2023-11-19 04:48:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:43,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788849722] [2023-11-19 04:48:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:43,053 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:43,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 04:48:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:48:43,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:43,116 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 04:48:43,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:43,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115069504] [2023-11-19 04:48:43,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788849722] [2023-11-19 04:48:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788849722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:43,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:43,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:43,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836297587] [2023-11-19 04:48:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:43,119 INFO L87 Difference]: Start difference. First operand 285 states and 366 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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 04:48:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:43,187 INFO L93 Difference]: Finished difference Result 380 states and 483 transitions. [2023-11-19 04:48:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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 41 [2023-11-19 04:48:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:43,191 INFO L225 Difference]: With dead ends: 380 [2023-11-19 04:48:43,191 INFO L226 Difference]: Without dead ends: 378 [2023-11-19 04:48:43,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 04:48:43,193 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 52 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:43,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 294 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-19 04:48:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 287. [2023-11-19 04:48:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 261 states have internal predecessors, (320), 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 04:48:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 366 transitions. [2023-11-19 04:48:43,216 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 366 transitions. Word has length 41 [2023-11-19 04:48:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:43,217 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 366 transitions. [2023-11-19 04:48:43,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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 04:48:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 366 transitions. [2023-11-19 04:48:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 04:48:43,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,220 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] [2023-11-19 04:48:43,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:43,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:43,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash 506854050, now seen corresponding path program 1 times [2023-11-19 04:48:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486810814] [2023-11-19 04:48:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:43,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830611761] [2023-11-19 04:48:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:43,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:43,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 04:48:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:48:43,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:43,522 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 04:48:43,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:43,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486810814] [2023-11-19 04:48:43,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830611761] [2023-11-19 04:48:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830611761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:43,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:43,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421378981] [2023-11-19 04:48:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:43,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:43,527 INFO L87 Difference]: Start difference. First operand 287 states and 366 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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 04:48:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:43,587 INFO L93 Difference]: Finished difference Result 379 states and 477 transitions. [2023-11-19 04:48:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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 42 [2023-11-19 04:48:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:43,591 INFO L225 Difference]: With dead ends: 379 [2023-11-19 04:48:43,592 INFO L226 Difference]: Without dead ends: 377 [2023-11-19 04:48:43,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 04:48:43,595 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 50 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:43,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 283 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-19 04:48:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 289. [2023-11-19 04:48:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 208 states have (on average 1.5288461538461537) internal successors, (318), 263 states have internal predecessors, (318), 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 04:48:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 364 transitions. [2023-11-19 04:48:43,615 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 364 transitions. Word has length 42 [2023-11-19 04:48:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:43,616 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 364 transitions. [2023-11-19 04:48:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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 04:48:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 364 transitions. [2023-11-19 04:48:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:48:43,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,619 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 04:48:43,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:43,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,833 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:43,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1467351794, now seen corresponding path program 1 times [2023-11-19 04:48:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101222154] [2023-11-19 04:48:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:43,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724594199] [2023-11-19 04:48:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:43,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:43,844 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:43,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 04:48:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:43,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:44,038 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 04:48:44,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:44,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101222154] [2023-11-19 04:48:44,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724594199] [2023-11-19 04:48:44,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724594199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:44,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:44,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:44,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832982720] [2023-11-19 04:48:44,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:44,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:44,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:44,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:44,042 INFO L87 Difference]: Start difference. First operand 289 states and 364 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 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 04:48:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:44,531 INFO L93 Difference]: Finished difference Result 317 states and 392 transitions. [2023-11-19 04:48:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 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 04:48:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:44,534 INFO L225 Difference]: With dead ends: 317 [2023-11-19 04:48:44,534 INFO L226 Difference]: Without dead ends: 316 [2023-11-19 04:48:44,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 04:48:44,535 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 197 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:44,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 158 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:48:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-19 04:48:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 289. [2023-11-19 04:48:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 208 states have (on average 1.5240384615384615) internal successors, (317), 263 states have internal predecessors, (317), 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 04:48:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 363 transitions. [2023-11-19 04:48:44,554 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 363 transitions. Word has length 43 [2023-11-19 04:48:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:44,554 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 363 transitions. [2023-11-19 04:48:44,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 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 04:48:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 363 transitions. [2023-11-19 04:48:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:48:44,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:44,555 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 04:48:44,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:44,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:44,769 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:44,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1467365696, now seen corresponding path program 1 times [2023-11-19 04:48:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31676017] [2023-11-19 04:48:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:44,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:44,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619179564] [2023-11-19 04:48:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:44,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:44,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 04:48:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:44,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:44,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:44,959 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 04:48:44,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:44,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31676017] [2023-11-19 04:48:44,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:44,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619179564] [2023-11-19 04:48:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619179564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:44,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:44,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748554416] [2023-11-19 04:48:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:44,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:44,962 INFO L87 Difference]: Start difference. First operand 289 states and 363 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 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 04:48:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,562 INFO L93 Difference]: Finished difference Result 316 states and 391 transitions. [2023-11-19 04:48:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 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 04:48:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,567 INFO L225 Difference]: With dead ends: 316 [2023-11-19 04:48:45,567 INFO L226 Difference]: Without dead ends: 315 [2023-11-19 04:48:45,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 04:48:45,568 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 185 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 163 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:48:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-19 04:48:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 291. [2023-11-19 04:48:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 210 states have (on average 1.519047619047619) internal successors, (319), 265 states have internal predecessors, (319), 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 04:48:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 365 transitions. [2023-11-19 04:48:45,588 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 365 transitions. Word has length 43 [2023-11-19 04:48:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,588 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 365 transitions. [2023-11-19 04:48:45,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 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 04:48:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 365 transitions. [2023-11-19 04:48:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 04:48:45,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,589 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, 1, 1, 1] [2023-11-19 04:48:45,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-19 04:48:45,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 04:48:45,809 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:45,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash 299958888, now seen corresponding path program 1 times [2023-11-19 04:48:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931086562] [2023-11-19 04:48:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:45,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123030328] [2023-11-19 04:48:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:45,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:45,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 04:48:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:48:45,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:45,976 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 04:48:45,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:45,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931086562] [2023-11-19 04:48:45,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123030328] [2023-11-19 04:48:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123030328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343217922] [2023-11-19 04:48:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:45,980 INFO L87 Difference]: Start difference. First operand 291 states and 365 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 04:48:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:46,159 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2023-11-19 04:48:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 46 [2023-11-19 04:48:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:46,162 INFO L225 Difference]: With dead ends: 291 [2023-11-19 04:48:46,162 INFO L226 Difference]: Without dead ends: 289 [2023-11-19 04:48:46,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 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 04:48:46,163 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 88 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:46,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 72 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-19 04:48:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-19 04:48:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 210 states have (on average 1.5) internal successors, (315), 263 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 04:48:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 361 transitions. [2023-11-19 04:48:46,183 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 361 transitions. Word has length 46 [2023-11-19 04:48:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:46,183 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 361 transitions. [2023-11-19 04:48:46,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 04:48:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 361 transitions. [2023-11-19 04:48:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 04:48:46,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:46,184 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, 1, 1, 1] [2023-11-19 04:48:46,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:46,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 04:48:46,397 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:46,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -114209496, now seen corresponding path program 1 times [2023-11-19 04:48:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:46,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346906401] [2023-11-19 04:48:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:46,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:46,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:46,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406620969] [2023-11-19 04:48:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:46,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:46,412 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:46,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 04:48:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:48:46,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:46,565 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 04:48:46,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:46,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346906401] [2023-11-19 04:48:46,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406620969] [2023-11-19 04:48:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406620969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:46,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:46,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384513568] [2023-11-19 04:48:46,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:46,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:46,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:46,570 INFO L87 Difference]: Start difference. First operand 289 states and 361 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 04:48:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:46,739 INFO L93 Difference]: Finished difference Result 370 states and 427 transitions. [2023-11-19 04:48:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 46 [2023-11-19 04:48:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:46,742 INFO L225 Difference]: With dead ends: 370 [2023-11-19 04:48:46,742 INFO L226 Difference]: Without dead ends: 368 [2023-11-19 04:48:46,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 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 04:48:46,744 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 70 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:46,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 171 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-19 04:48:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 297. [2023-11-19 04:48:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 218 states have (on average 1.4908256880733946) internal successors, (325), 271 states have internal predecessors, (325), 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 04:48:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 371 transitions. [2023-11-19 04:48:46,766 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 371 transitions. Word has length 46 [2023-11-19 04:48:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:46,766 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 371 transitions. [2023-11-19 04:48:46,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 04:48:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 371 transitions. [2023-11-19 04:48:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:48:46,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:46,768 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, 1, 1, 1] [2023-11-19 04:48:46,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:46,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:46,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1751592044, now seen corresponding path program 1 times [2023-11-19 04:48:46,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:46,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447028914] [2023-11-19 04:48:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:46,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:47,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:47,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788357957] [2023-11-19 04:48:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:47,003 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:47,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 04:48:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:47,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:47,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:48:47,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:47,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:47,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447028914] [2023-11-19 04:48:47,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:47,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788357957] [2023-11-19 04:48:47,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788357957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:47,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:47,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:48:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341010852] [2023-11-19 04:48:47,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:47,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:47,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:47,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:47,129 INFO L87 Difference]: Start difference. First operand 297 states and 371 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:48:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:47,161 INFO L93 Difference]: Finished difference Result 297 states and 371 transitions. [2023-11-19 04:48:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:47,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-19 04:48:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:47,164 INFO L225 Difference]: With dead ends: 297 [2023-11-19 04:48:47,164 INFO L226 Difference]: Without dead ends: 296 [2023-11-19 04:48:47,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:47,165 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 106 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:47,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 256 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-19 04:48:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-11-19 04:48:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 218 states have (on average 1.4770642201834863) internal successors, (322), 270 states have internal predecessors, (322), 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 04:48:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 368 transitions. [2023-11-19 04:48:47,186 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 368 transitions. Word has length 49 [2023-11-19 04:48:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:47,186 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 368 transitions. [2023-11-19 04:48:47,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:48:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 368 transitions. [2023-11-19 04:48:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:48:47,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:47,188 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:47,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:47,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:47,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1535221528, now seen corresponding path program 1 times [2023-11-19 04:48:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:47,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852997786] [2023-11-19 04:48:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:47,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:47,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598981874] [2023-11-19 04:48:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:47,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:47,415 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:47,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-19 04:48:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:47,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:48:47,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:48:47,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:47,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:47,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852997786] [2023-11-19 04:48:47,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:47,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598981874] [2023-11-19 04:48:47,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598981874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:47,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:47,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:48:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852829760] [2023-11-19 04:48:47,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:47,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:47,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:47,550 INFO L87 Difference]: Start difference. First operand 296 states and 368 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:48:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:47,634 INFO L93 Difference]: Finished difference Result 386 states and 474 transitions. [2023-11-19 04:48:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:47,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-11-19 04:48:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:47,637 INFO L225 Difference]: With dead ends: 386 [2023-11-19 04:48:47,638 INFO L226 Difference]: Without dead ends: 385 [2023-11-19 04:48:47,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:47,639 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 99 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:47,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 581 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-19 04:48:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 347. [2023-11-19 04:48:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 261 states have (on average 1.4865900383141764) internal successors, (388), 314 states have internal predecessors, (388), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 04:48:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 450 transitions. [2023-11-19 04:48:47,669 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 450 transitions. Word has length 50 [2023-11-19 04:48:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:47,669 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 450 transitions. [2023-11-19 04:48:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:48:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 450 transitions. [2023-11-19 04:48:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:48:47,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:47,670 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:47,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:47,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:47,891 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:47,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:47,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2131441058, now seen corresponding path program 1 times [2023-11-19 04:48:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821922304] [2023-11-19 04:48:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:47,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:47,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631773967] [2023-11-19 04:48:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:47,914 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:47,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 04:48:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:47,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:48:47,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:48:48,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:48,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821922304] [2023-11-19 04:48:48,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631773967] [2023-11-19 04:48:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631773967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:48,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:48,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:48,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279054512] [2023-11-19 04:48:48,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:48,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:48,181 INFO L87 Difference]: Start difference. First operand 347 states and 450 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 04:48:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:48,538 INFO L93 Difference]: Finished difference Result 444 states and 530 transitions. [2023-11-19 04:48:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2023-11-19 04:48:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:48,543 INFO L225 Difference]: With dead ends: 444 [2023-11-19 04:48:48,543 INFO L226 Difference]: Without dead ends: 443 [2023-11-19 04:48:48,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 04:48:48,544 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 108 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:48,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 130 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:48:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-19 04:48:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 348. [2023-11-19 04:48:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 262 states have (on average 1.4809160305343512) internal successors, (388), 315 states have internal predecessors, (388), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 04:48:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 450 transitions. [2023-11-19 04:48:48,588 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 450 transitions. Word has length 52 [2023-11-19 04:48:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:48,589 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 450 transitions. [2023-11-19 04:48:48,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 04:48:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 450 transitions. [2023-11-19 04:48:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 04:48:48,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:48,590 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:48,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:48,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:48,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:48,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1650163505, now seen corresponding path program 1 times [2023-11-19 04:48:48,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:48,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227732750] [2023-11-19 04:48:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:48,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:48,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:48,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198564101] [2023-11-19 04:48:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:48,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:48,825 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:48,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-19 04:48:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:48,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:48:48,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:48:49,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:49,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:49,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227732750] [2023-11-19 04:48:49,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198564101] [2023-11-19 04:48:49,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198564101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:49,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:49,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:49,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863546470] [2023-11-19 04:48:49,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:49,092 INFO L87 Difference]: Start difference. First operand 348 states and 450 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 04:48:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:49,533 INFO L93 Difference]: Finished difference Result 442 states and 528 transitions. [2023-11-19 04:48:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2023-11-19 04:48:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:49,535 INFO L225 Difference]: With dead ends: 442 [2023-11-19 04:48:49,535 INFO L226 Difference]: Without dead ends: 441 [2023-11-19 04:48:49,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 04:48:49,536 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 103 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:49,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 136 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:48:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-19 04:48:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 349. [2023-11-19 04:48:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 263 states have (on average 1.4752851711026616) internal successors, (388), 316 states have internal predecessors, (388), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 04:48:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 450 transitions. [2023-11-19 04:48:49,566 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 450 transitions. Word has length 53 [2023-11-19 04:48:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:49,566 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 450 transitions. [2023-11-19 04:48:49,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 04:48:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 450 transitions. [2023-11-19 04:48:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:48:49,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:49,570 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:49,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:49,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:49,789 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:48:49,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2120859831, now seen corresponding path program 1 times [2023-11-19 04:48:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:49,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541559066] [2023-11-19 04:48:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:49,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:49,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:49,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10182273] [2023-11-19 04:48:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:49,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:49,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:49,806 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:49,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-19 04:48:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:49,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:48:49,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:48:49,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:48:50,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541559066] [2023-11-19 04:48:50,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10182273] [2023-11-19 04:48:50,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10182273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535648418] [2023-11-19 04:48:50,100 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-19 04:48:50,101 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:50,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:50,109 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:50,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:54,678 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-19 04:48:54,680 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-11-19 04:48:54,716 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [535648418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:48:58,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5, 6] total 30 [2023-11-19 04:48:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890885260] [2023-11-19 04:48:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 04:48:58,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 04:48:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2023-11-19 04:48:58,689 INFO L87 Difference]: Start difference. First operand 349 states and 450 transitions. Second operand has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 04:49:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:03,937 INFO L93 Difference]: Finished difference Result 443 states and 539 transitions. [2023-11-19 04:49:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 04:49:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2023-11-19 04:49:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:03,940 INFO L225 Difference]: With dead ends: 443 [2023-11-19 04:49:03,940 INFO L226 Difference]: Without dead ends: 322 [2023-11-19 04:49:03,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 04:49:03,942 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 228 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:03,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 416 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-19 04:49:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-19 04:49:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2023-11-19 04:49:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 226 states have (on average 1.4601769911504425) internal successors, (330), 279 states have internal predecessors, (330), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 04:49:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 382 transitions. [2023-11-19 04:49:03,970 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 382 transitions. Word has length 52 [2023-11-19 04:49:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:03,970 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 382 transitions. [2023-11-19 04:49:03,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 04:49:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 382 transitions. [2023-11-19 04:49:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:49:03,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:03,972 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:03,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:04,189 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:49:04,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash -825253545, now seen corresponding path program 1 times [2023-11-19 04:49:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:04,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459312506] [2023-11-19 04:49:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:04,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:04,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:49:04,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499435895] [2023-11-19 04:49:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:04,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:04,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:04,199 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:04,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-19 04:49:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:04,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:49:04,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:49:04,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:49:04,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:04,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459312506] [2023-11-19 04:49:04,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:49:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499435895] [2023-11-19 04:49:04,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499435895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1004487508] [2023-11-19 04:49:04,410 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-19 04:49:04,410 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:04,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:04,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:04,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:07,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-19 04:49:07,402 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-11-19 04:49:07,422 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:10,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1004487508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:10,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:10,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6] total 29 [2023-11-19 04:49:10,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338683025] [2023-11-19 04:49:10,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:10,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 04:49:10,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 04:49:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-11-19 04:49:10,927 INFO L87 Difference]: Start difference. First operand 308 states and 382 transitions. Second operand has 21 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 04:49:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:14,779 INFO L93 Difference]: Finished difference Result 360 states and 412 transitions. [2023-11-19 04:49:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 04:49:14,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 52 [2023-11-19 04:49:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:14,781 INFO L225 Difference]: With dead ends: 360 [2023-11-19 04:49:14,782 INFO L226 Difference]: Without dead ends: 279 [2023-11-19 04:49:14,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 04:49:14,783 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 181 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:14,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 370 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 04:49:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-19 04:49:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 259. [2023-11-19 04:49:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 233 states have internal predecessors, (256), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 04:49:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 296 transitions. [2023-11-19 04:49:14,806 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 296 transitions. Word has length 52 [2023-11-19 04:49:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:14,807 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 296 transitions. [2023-11-19 04:49:14,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 04:49:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 296 transitions. [2023-11-19 04:49:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 04:49:14,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:14,808 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:14,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:15,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 04:49:15,028 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:49:15,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash -56255235, now seen corresponding path program 1 times [2023-11-19 04:49:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:15,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564774500] [2023-11-19 04:49:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:15,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:49:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447398429] [2023-11-19 04:49:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:15,036 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:15,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-19 04:49:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:15,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:49:15,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:49:15,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:49:15,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564774500] [2023-11-19 04:49:15,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:49:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447398429] [2023-11-19 04:49:15,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447398429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:15,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599440664] [2023-11-19 04:49:15,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:49:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:49:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:49:15,291 INFO L87 Difference]: Start difference. First operand 259 states and 296 transitions. Second operand has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-11-19 04:49:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:15,515 INFO L93 Difference]: Finished difference Result 396 states and 462 transitions. [2023-11-19 04:49:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:49:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 4 states have internal predecessors, (61), 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) Word has length 83 [2023-11-19 04:49:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:15,520 INFO L225 Difference]: With dead ends: 396 [2023-11-19 04:49:15,520 INFO L226 Difference]: Without dead ends: 394 [2023-11-19 04:49:15,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 04:49:15,521 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 163 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:15,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 175 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:49:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-19 04:49:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 256. [2023-11-19 04:49:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 180 states have (on average 1.4) internal successors, (252), 230 states have internal predecessors, (252), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 04:49:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2023-11-19 04:49:15,546 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 83 [2023-11-19 04:49:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:15,546 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2023-11-19 04:49:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-11-19 04:49:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2023-11-19 04:49:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 04:49:15,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:15,548 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:15,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-19 04:49:15,764 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-19 04:49:15,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1743912181, now seen corresponding path program 1 times [2023-11-19 04:49:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987257899] [2023-11-19 04:49:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:15,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:49:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937339950] [2023-11-19 04:49:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:15,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:15,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:15,780 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:15,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e396dad-46e5-4627-a5f2-dbaff6268960/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-19 04:49:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:15,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:49:15,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:49:16,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:49:16,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:16,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987257899] [2023-11-19 04:49:16,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:49:16,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937339950] [2023-11-19 04:49:16,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937339950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763996841] [2023-11-19 04:49:16,202 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-11-19 04:49:16,202 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:16,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:16,202 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:16,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:19,120 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-19 04:49:19,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-11-19 04:49:19,140 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:23,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [763996841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:23,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:23,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [3, 3] total 26 [2023-11-19 04:49:23,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714764590] [2023-11-19 04:49:23,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:23,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 04:49:23,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 04:49:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-11-19 04:49:23,441 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand has 23 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5)