./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire --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 ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:50,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:51,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 21:16:51,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:51,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:51,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:51,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:51,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:51,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:51,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:51,113 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:51,114 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:51,114 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:51,115 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:51,116 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:51,116 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:51,117 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:51,118 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:51,118 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:51,119 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:51,119 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:51,120 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:51,121 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:51,122 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:51,122 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:16:51,122 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:51,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:16:51,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:51,124 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:51,124 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:51,124 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:51,125 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:16:51,125 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:16:51,126 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:16:51,126 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:51,126 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:51,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:51,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:51,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:51,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:51,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:51,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:51,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:51,128 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:51,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:51,129 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:51,129 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:51,129 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:51,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:51,130 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_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 [2023-11-23 21:16:51,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:51,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:51,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:51,446 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:51,447 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:51,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2023-11-23 21:16:54,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:54,887 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:54,887 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2023-11-23 21:16:54,896 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/data/9c77f0333/c2816d0fe97a4e60ac8ccc6a4ae53edf/FLAG6120012d4 [2023-11-23 21:16:54,912 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/data/9c77f0333/c2816d0fe97a4e60ac8ccc6a4ae53edf [2023-11-23 21:16:54,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:54,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:54,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:54,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:54,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:54,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:54" (1/1) ... [2023-11-23 21:16:54,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e212b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:54, skipping insertion in model container [2023-11-23 21:16:54,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:54" (1/1) ... [2023-11-23 21:16:54,960 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:55,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:55,197 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:55,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:55,238 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:55,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55 WrapperNode [2023-11-23 21:16:55,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:55,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:55,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:55,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:55,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,297 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2023-11-23 21:16:55,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:55,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:55,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:55,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:55,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,311 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,312 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,323 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:55,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:55,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:55,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:55,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:55,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:55,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:16:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:16:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:16:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:16:55,487 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:55,489 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:56,025 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:16:56,072 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:16:56,072 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:16:56,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:56 BoogieIcfgContainer [2023-11-23 21:16:56,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:16:56,076 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:16:56,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:16:56,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:16:56,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:54" (1/3) ... [2023-11-23 21:16:56,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d73179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:56, skipping insertion in model container [2023-11-23 21:16:56,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55" (2/3) ... [2023-11-23 21:16:56,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d73179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:56, skipping insertion in model container [2023-11-23 21:16:56,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:56" (3/3) ... [2023-11-23 21:16:56,089 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2023-11-23 21:16:56,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:16:56,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-11-23 21:16:56,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:16:56,185 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;@7b1a516f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:16:56,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-23 21:16:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 140 states have internal predecessors, (143), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:16:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:16:56,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:56,197 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:56,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:16:56,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2084841642, now seen corresponding path program 1 times [2023-11-23 21:16:56,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:56,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700022466] [2023-11-23 21:16:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:56,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:56,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:16:56,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154228749] [2023-11-23 21:16:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:56,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:56,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:56,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:16:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:56,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:16:56,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:16:56,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:16:56,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:56,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700022466] [2023-11-23 21:16:56,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:16:56,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154228749] [2023-11-23 21:16:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154228749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:56,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:56,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:16:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412816945] [2023-11-23 21:16:56,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:16:56,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:16:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:16:56,693 INFO L87 Difference]: Start difference. First operand has 154 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 140 states have internal predecessors, (143), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 6 states, 2 states have (on average 3.0) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:16:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:56,983 INFO L93 Difference]: Finished difference Result 289 states and 310 transitions. [2023-11-23 21:16:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:16:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 2 states have (on average 3.0) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 16 [2023-11-23 21:16:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:56,995 INFO L225 Difference]: With dead ends: 289 [2023-11-23 21:16:56,995 INFO L226 Difference]: Without dead ends: 148 [2023-11-23 21:16:56,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:16:57,003 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 264 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:57,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 158 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:16:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-23 21:16:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-11-23 21:16:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 74 states have (on average 1.837837837837838) internal successors, (136), 135 states have internal predecessors, (136), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:16:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2023-11-23 21:16:57,060 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 16 [2023-11-23 21:16:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:57,061 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2023-11-23 21:16:57,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 2 states have (on average 3.0) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:16:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2023-11-23 21:16:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:16:57,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:57,064 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:57,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:16:57,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:16:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash -205581420, now seen corresponding path program 1 times [2023-11-23 21:16:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993104056] [2023-11-23 21:16:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:57,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:16:57,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673099389] [2023-11-23 21:16:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:57,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:57,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:57,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:16:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:57,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:16:57,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:16:57,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:57,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:57,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993104056] [2023-11-23 21:16:57,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:16:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673099389] [2023-11-23 21:16:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673099389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951673240] [2023-11-23 21:16:57,845 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-23 21:16:57,845 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:57,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:16:57,855 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:16:57,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:16:58,645 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 21:16:58,649 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:16:59,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [951673240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:59,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:16:59,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 14 [2023-11-23 21:16:59,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092943908] [2023-11-23 21:16:59,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:16:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:16:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:16:59,204 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 11 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:17:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:00,045 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2023-11-23 21:17:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:17:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-11-23 21:17:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:00,048 INFO L225 Difference]: With dead ends: 177 [2023-11-23 21:17:00,048 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 21:17:00,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:17:00,051 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 263 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:00,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 115 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:17:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 21:17:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-23 21:17:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 135 states have internal predecessors, (137), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:17:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 159 transitions. [2023-11-23 21:17:00,101 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 159 transitions. Word has length 17 [2023-11-23 21:17:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:00,102 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 159 transitions. [2023-11-23 21:17:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:17:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 159 transitions. [2023-11-23 21:17:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:17:00,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:00,106 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:00,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:00,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:00,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:00,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash 4470337, now seen corresponding path program 1 times [2023-11-23 21:17:00,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481816394] [2023-11-23 21:17:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:00,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:00,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828248790] [2023-11-23 21:17:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:00,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:00,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:00,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:17:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:00,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:17:00,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:00,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:00,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481816394] [2023-11-23 21:17:00,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828248790] [2023-11-23 21:17:00,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828248790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:00,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:00,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:17:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41324849] [2023-11-23 21:17:00,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:00,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:00,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:00,445 INFO L87 Difference]: Start difference. First operand 149 states and 159 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, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:17:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:00,545 INFO L93 Difference]: Finished difference Result 279 states and 295 transitions. [2023-11-23 21:17:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:00,545 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, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 29 [2023-11-23 21:17:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:00,548 INFO L225 Difference]: With dead ends: 279 [2023-11-23 21:17:00,548 INFO L226 Difference]: Without dead ends: 271 [2023-11-23 21:17:00,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:00,551 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 119 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:00,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 252 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-23 21:17:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 202. [2023-11-23 21:17:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 125 states have (on average 1.8) internal successors, (225), 184 states have internal predecessors, (225), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:17:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 255 transitions. [2023-11-23 21:17:00,578 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 255 transitions. Word has length 29 [2023-11-23 21:17:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:00,578 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 255 transitions. [2023-11-23 21:17:00,579 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, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:17:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 255 transitions. [2023-11-23 21:17:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 21:17:00,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:00,580 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:00,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:00,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:00,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:00,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1028963, now seen corresponding path program 1 times [2023-11-23 21:17:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:00,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917572816] [2023-11-23 21:17:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:00,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:00,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373337430] [2023-11-23 21:17:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:00,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:00,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:00,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:17:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:00,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:17:00,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:00,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:00,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917572816] [2023-11-23 21:17:00,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373337430] [2023-11-23 21:17:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373337430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:00,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:00,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:17:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650622820] [2023-11-23 21:17:00,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:17:00,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:17:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:17:00,959 INFO L87 Difference]: Start difference. First operand 202 states and 255 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:17:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:02,406 INFO L93 Difference]: Finished difference Result 411 states and 475 transitions. [2023-11-23 21:17:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:17:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 31 [2023-11-23 21:17:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:02,410 INFO L225 Difference]: With dead ends: 411 [2023-11-23 21:17:02,411 INFO L226 Difference]: Without dead ends: 410 [2023-11-23 21:17:02,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:17:02,413 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 548 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:02,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 255 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:17:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-23 21:17:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 206. [2023-11-23 21:17:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.7751937984496124) internal successors, (229), 188 states have internal predecessors, (229), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:17:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 259 transitions. [2023-11-23 21:17:02,442 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 259 transitions. Word has length 31 [2023-11-23 21:17:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:02,442 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 259 transitions. [2023-11-23 21:17:02,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:17:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 259 transitions. [2023-11-23 21:17:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:17:02,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:02,444 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:02,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:02,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:02,663 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:02,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:02,664 INFO L85 PathProgramCache]: Analyzing trace with hash 31897932, now seen corresponding path program 1 times [2023-11-23 21:17:02,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:02,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134162303] [2023-11-23 21:17:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:02,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:02,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358730611] [2023-11-23 21:17:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:02,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:02,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:02,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:02,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:17:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:02,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:17:02,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:02,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:02,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134162303] [2023-11-23 21:17:02,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358730611] [2023-11-23 21:17:02,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358730611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:02,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:17:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288805798] [2023-11-23 21:17:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:02,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:17:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:17:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:17:02,815 INFO L87 Difference]: Start difference. First operand 206 states and 259 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:17:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:03,690 INFO L93 Difference]: Finished difference Result 410 states and 474 transitions. [2023-11-23 21:17:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:17:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-11-23 21:17:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:03,693 INFO L225 Difference]: With dead ends: 410 [2023-11-23 21:17:03,693 INFO L226 Difference]: Without dead ends: 409 [2023-11-23 21:17:03,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:17:03,695 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 584 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:03,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 235 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:17:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-23 21:17:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 207. [2023-11-23 21:17:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 130 states have (on average 1.7692307692307692) internal successors, (230), 189 states have internal predecessors, (230), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:17:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2023-11-23 21:17:03,719 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 32 [2023-11-23 21:17:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:03,719 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2023-11-23 21:17:03,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:17:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2023-11-23 21:17:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:17:03,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:03,721 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:03,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:03,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:03,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash -763033702, now seen corresponding path program 1 times [2023-11-23 21:17:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:03,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815634069] [2023-11-23 21:17:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:03,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:03,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454866371] [2023-11-23 21:17:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:03,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:03,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:03,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:03,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:17:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:04,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:17:04,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:04,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:04,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:04,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815634069] [2023-11-23 21:17:04,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:04,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454866371] [2023-11-23 21:17:04,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454866371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:04,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:04,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:17:04,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317555432] [2023-11-23 21:17:04,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:04,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:04,044 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:04,098 INFO L93 Difference]: Finished difference Result 348 states and 447 transitions. [2023-11-23 21:17:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 36 [2023-11-23 21:17:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:04,101 INFO L225 Difference]: With dead ends: 348 [2023-11-23 21:17:04,101 INFO L226 Difference]: Without dead ends: 346 [2023-11-23 21:17:04,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:04,103 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 84 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:04,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 278 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:17:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-23 21:17:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 294. [2023-11-23 21:17:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 209 states have (on average 1.8229665071770336) internal successors, (381), 268 states have internal predecessors, (381), 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) [2023-11-23 21:17:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 427 transitions. [2023-11-23 21:17:04,132 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 427 transitions. Word has length 36 [2023-11-23 21:17:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:04,132 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 427 transitions. [2023-11-23 21:17:04,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 427 transitions. [2023-11-23 21:17:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:17:04,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:04,134 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:04,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:04,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:04,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1164022684, now seen corresponding path program 1 times [2023-11-23 21:17:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:04,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050797226] [2023-11-23 21:17:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:04,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:04,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139087633] [2023-11-23 21:17:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:04,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:04,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:04,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:04,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:17:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:04,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:04,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:04,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:04,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:04,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050797226] [2023-11-23 21:17:04,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:04,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139087633] [2023-11-23 21:17:04,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139087633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:04,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:04,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98014089] [2023-11-23 21:17:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:04,530 INFO L87 Difference]: Start difference. First operand 294 states and 427 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:05,120 INFO L93 Difference]: Finished difference Result 334 states and 429 transitions. [2023-11-23 21:17:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:05,121 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 38 [2023-11-23 21:17:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:05,124 INFO L225 Difference]: With dead ends: 334 [2023-11-23 21:17:05,124 INFO L226 Difference]: Without dead ends: 333 [2023-11-23 21:17:05,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:05,125 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 273 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:05,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 185 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:17:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-23 21:17:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 294. [2023-11-23 21:17:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 209 states have (on average 1.813397129186603) internal successors, (379), 268 states have internal predecessors, (379), 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) [2023-11-23 21:17:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 425 transitions. [2023-11-23 21:17:05,153 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 425 transitions. Word has length 38 [2023-11-23 21:17:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:05,154 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 425 transitions. [2023-11-23 21:17:05,154 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 425 transitions. [2023-11-23 21:17:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:17:05,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:05,157 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:05,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:05,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1724964924, now seen corresponding path program 1 times [2023-11-23 21:17:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990965145] [2023-11-23 21:17:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:05,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:05,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039755885] [2023-11-23 21:17:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:05,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:05,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:05,390 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:17:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:05,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:05,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:05,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:05,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:05,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990965145] [2023-11-23 21:17:05,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:05,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039755885] [2023-11-23 21:17:05,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039755885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:05,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:05,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147023988] [2023-11-23 21:17:05,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:05,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:05,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:05,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:05,536 INFO L87 Difference]: Start difference. First operand 294 states and 425 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:05,945 INFO L93 Difference]: Finished difference Result 333 states and 427 transitions. [2023-11-23 21:17:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:05,946 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2023-11-23 21:17:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:05,948 INFO L225 Difference]: With dead ends: 333 [2023-11-23 21:17:05,948 INFO L226 Difference]: Without dead ends: 332 [2023-11-23 21:17:05,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:05,950 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 269 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:05,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 185 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:17:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-23 21:17:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 294. [2023-11-23 21:17:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 209 states have (on average 1.8038277511961722) internal successors, (377), 268 states have internal predecessors, (377), 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) [2023-11-23 21:17:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 423 transitions. [2023-11-23 21:17:05,976 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 423 transitions. Word has length 39 [2023-11-23 21:17:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:05,976 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 423 transitions. [2023-11-23 21:17:05,976 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 423 transitions. [2023-11-23 21:17:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:17:05,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:05,978 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:06,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:06,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:06,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:06,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1934305182, now seen corresponding path program 1 times [2023-11-23 21:17:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710514320] [2023-11-23 21:17:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:06,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:06,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691237201] [2023-11-23 21:17:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:06,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:06,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:06,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:06,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:17:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:06,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:06,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:06,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:06,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710514320] [2023-11-23 21:17:06,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691237201] [2023-11-23 21:17:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691237201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:06,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226924549] [2023-11-23 21:17:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:06,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:06,321 INFO L87 Difference]: Start difference. First operand 294 states and 423 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:06,436 INFO L93 Difference]: Finished difference Result 344 states and 439 transitions. [2023-11-23 21:17:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:06,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2023-11-23 21:17:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:06,440 INFO L225 Difference]: With dead ends: 344 [2023-11-23 21:17:06,440 INFO L226 Difference]: Without dead ends: 343 [2023-11-23 21:17:06,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:06,441 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 153 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:06,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 273 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-23 21:17:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 294. [2023-11-23 21:17:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 209 states have (on average 1.7942583732057416) internal successors, (375), 268 states have internal predecessors, (375), 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) [2023-11-23 21:17:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2023-11-23 21:17:06,469 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 40 [2023-11-23 21:17:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:06,469 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2023-11-23 21:17:06,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2023-11-23 21:17:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 21:17:06,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:06,471 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:06,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:06,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:06,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:06,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash -166081410, now seen corresponding path program 1 times [2023-11-23 21:17:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:06,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916354692] [2023-11-23 21:17:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:06,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:06,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311434473] [2023-11-23 21:17:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:06,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:06,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:06,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:06,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:17:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:06,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:06,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:17:06,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:06,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916354692] [2023-11-23 21:17:06,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311434473] [2023-11-23 21:17:06,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311434473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:06,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:06,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964834413] [2023-11-23 21:17:06,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:06,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:06,829 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:07,125 INFO L93 Difference]: Finished difference Result 343 states and 437 transitions. [2023-11-23 21:17:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:07,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2023-11-23 21:17:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:07,128 INFO L225 Difference]: With dead ends: 343 [2023-11-23 21:17:07,128 INFO L226 Difference]: Without dead ends: 342 [2023-11-23 21:17:07,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:07,129 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 83 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:07,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 347 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:17:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-23 21:17:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 294. [2023-11-23 21:17:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 209 states have (on average 1.784688995215311) internal successors, (373), 268 states have internal predecessors, (373), 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) [2023-11-23 21:17:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 419 transitions. [2023-11-23 21:17:07,157 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 419 transitions. Word has length 41 [2023-11-23 21:17:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:07,157 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 419 transitions. [2023-11-23 21:17:07,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 419 transitions. [2023-11-23 21:17:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:17:07,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:07,159 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:07,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:07,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:07,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:07,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:07,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2085086507, now seen corresponding path program 1 times [2023-11-23 21:17:07,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:07,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722685909] [2023-11-23 21:17:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:07,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:07,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:07,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098939612] [2023-11-23 21:17:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:07,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:07,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:07,387 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:07,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:17:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:07,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:17:07,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:17:07,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:07,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722685909] [2023-11-23 21:17:07,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098939612] [2023-11-23 21:17:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098939612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:07,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:07,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:17:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751428830] [2023-11-23 21:17:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:07,494 INFO L87 Difference]: Start difference. First operand 294 states and 419 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:07,636 INFO L93 Difference]: Finished difference Result 342 states and 435 transitions. [2023-11-23 21:17:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-11-23 21:17:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:07,640 INFO L225 Difference]: With dead ends: 342 [2023-11-23 21:17:07,640 INFO L226 Difference]: Without dead ends: 334 [2023-11-23 21:17:07,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:07,641 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 66 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:07,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 211 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-23 21:17:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 297. [2023-11-23 21:17:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.7169811320754718) internal successors, (364), 271 states have internal predecessors, (364), 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) [2023-11-23 21:17:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 410 transitions. [2023-11-23 21:17:07,669 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 410 transitions. Word has length 45 [2023-11-23 21:17:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:07,669 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 410 transitions. [2023-11-23 21:17:07,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 410 transitions. [2023-11-23 21:17:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:17:07,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:07,671 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:07,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:07,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:07,884 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:07,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1981597111, now seen corresponding path program 1 times [2023-11-23 21:17:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307254642] [2023-11-23 21:17:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:07,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:07,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898317978] [2023-11-23 21:17:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:07,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:07,913 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:07,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:17:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:07,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:07,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:17:08,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:08,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307254642] [2023-11-23 21:17:08,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898317978] [2023-11-23 21:17:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898317978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:08,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:08,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975638164] [2023-11-23 21:17:08,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:08,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:08,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:08,088 INFO L87 Difference]: Start difference. First operand 297 states and 410 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-11-23 21:17:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:08,677 INFO L93 Difference]: Finished difference Result 344 states and 431 transitions. [2023-11-23 21:17:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:08,678 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), 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 47 [2023-11-23 21:17:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:08,680 INFO L225 Difference]: With dead ends: 344 [2023-11-23 21:17:08,680 INFO L226 Difference]: Without dead ends: 342 [2023-11-23 21:17:08,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:08,681 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 197 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:08,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 155 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:17:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-23 21:17:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 297. [2023-11-23 21:17:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.6981132075471699) internal successors, (360), 271 states have internal predecessors, (360), 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) [2023-11-23 21:17:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 406 transitions. [2023-11-23 21:17:08,709 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 406 transitions. Word has length 47 [2023-11-23 21:17:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:08,710 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 406 transitions. [2023-11-23 21:17:08,710 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), 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) [2023-11-23 21:17:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 406 transitions. [2023-11-23 21:17:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:17:08,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:08,711 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:08,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:08,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:17:08,924 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:08,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1299968398, now seen corresponding path program 1 times [2023-11-23 21:17:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:08,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244705408] [2023-11-23 21:17:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:08,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:08,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019978086] [2023-11-23 21:17:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:08,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:08,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:08,962 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:08,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:17:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:09,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:09,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:17:09,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:09,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:09,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244705408] [2023-11-23 21:17:09,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:09,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019978086] [2023-11-23 21:17:09,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019978086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:09,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:09,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:09,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776664786] [2023-11-23 21:17:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:09,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:09,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:09,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:09,175 INFO L87 Difference]: Start difference. First operand 297 states and 406 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-11-23 21:17:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:09,476 INFO L93 Difference]: Finished difference Result 342 states and 427 transitions. [2023-11-23 21:17:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:09,477 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), 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 48 [2023-11-23 21:17:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:09,480 INFO L225 Difference]: With dead ends: 342 [2023-11-23 21:17:09,480 INFO L226 Difference]: Without dead ends: 340 [2023-11-23 21:17:09,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:09,481 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 261 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:09,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 143 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:17:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-23 21:17:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2023-11-23 21:17:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.679245283018868) internal successors, (356), 271 states have internal predecessors, (356), 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) [2023-11-23 21:17:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2023-11-23 21:17:09,510 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 48 [2023-11-23 21:17:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:09,511 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2023-11-23 21:17:09,511 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), 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) [2023-11-23 21:17:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2023-11-23 21:17:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 21:17:09,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:09,513 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:09,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:09,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:17:09,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:09,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1644314777, now seen corresponding path program 1 times [2023-11-23 21:17:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967660167] [2023-11-23 21:17:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:09,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:09,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641250594] [2023-11-23 21:17:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:09,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:09,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:09,746 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:09,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:17:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:09,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:09,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:17:09,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:09,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967660167] [2023-11-23 21:17:09,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641250594] [2023-11-23 21:17:09,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641250594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:09,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:09,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117564939] [2023-11-23 21:17:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:09,873 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:10,524 INFO L93 Difference]: Finished difference Result 330 states and 413 transitions. [2023-11-23 21:17:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2023-11-23 21:17:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:10,527 INFO L225 Difference]: With dead ends: 330 [2023-11-23 21:17:10,527 INFO L226 Difference]: Without dead ends: 329 [2023-11-23 21:17:10,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:10,528 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 70 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:10,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 264 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:17:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-23 21:17:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 297. [2023-11-23 21:17:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.669811320754717) internal successors, (354), 271 states have internal predecessors, (354), 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) [2023-11-23 21:17:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 400 transitions. [2023-11-23 21:17:10,556 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 400 transitions. Word has length 49 [2023-11-23 21:17:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:10,556 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 400 transitions. [2023-11-23 21:17:10,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 400 transitions. [2023-11-23 21:17:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:17:10,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:10,558 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:10,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:10,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 21:17:10,779 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:10,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -565849360, now seen corresponding path program 1 times [2023-11-23 21:17:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:10,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911829800] [2023-11-23 21:17:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:10,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:10,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626920481] [2023-11-23 21:17:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:10,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:10,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:10,791 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:10,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:17:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:10,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:10,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:17:10,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:10,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:10,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911829800] [2023-11-23 21:17:10,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:10,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626920481] [2023-11-23 21:17:10,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626920481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:10,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:10,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84399788] [2023-11-23 21:17:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:10,922 INFO L87 Difference]: Start difference. First operand 297 states and 400 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:11,152 INFO L93 Difference]: Finished difference Result 329 states and 411 transitions. [2023-11-23 21:17:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-11-23 21:17:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:11,155 INFO L225 Difference]: With dead ends: 329 [2023-11-23 21:17:11,155 INFO L226 Difference]: Without dead ends: 328 [2023-11-23 21:17:11,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:11,156 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 124 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:11,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 225 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:17:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-23 21:17:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 297. [2023-11-23 21:17:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.6603773584905661) internal successors, (352), 271 states have internal predecessors, (352), 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) [2023-11-23 21:17:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 398 transitions. [2023-11-23 21:17:11,185 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 398 transitions. Word has length 50 [2023-11-23 21:17:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 398 transitions. [2023-11-23 21:17:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 398 transitions. [2023-11-23 21:17:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:17:11,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:11,187 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:11,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:11,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:17:11,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:11,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2070054126, now seen corresponding path program 1 times [2023-11-23 21:17:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:11,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524053966] [2023-11-23 21:17:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:11,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:11,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202887132] [2023-11-23 21:17:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:11,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:11,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:11,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:17:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:11,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:17:11,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:17:11,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:11,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524053966] [2023-11-23 21:17:11,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202887132] [2023-11-23 21:17:11,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202887132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:11,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:11,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:11,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804916871] [2023-11-23 21:17:11,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:11,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:11,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:11,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:11,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:11,665 INFO L87 Difference]: Start difference. First operand 297 states and 398 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:11,954 INFO L93 Difference]: Finished difference Result 338 states and 419 transitions. [2023-11-23 21:17:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-11-23 21:17:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:11,957 INFO L225 Difference]: With dead ends: 338 [2023-11-23 21:17:11,958 INFO L226 Difference]: Without dead ends: 337 [2023-11-23 21:17:11,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:11,959 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 59 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:11,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 307 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:17:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-23 21:17:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 297. [2023-11-23 21:17:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.650943396226415) internal successors, (350), 271 states have internal predecessors, (350), 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) [2023-11-23 21:17:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 396 transitions. [2023-11-23 21:17:11,993 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 396 transitions. Word has length 56 [2023-11-23 21:17:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:11,993 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 396 transitions. [2023-11-23 21:17:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 396 transitions. [2023-11-23 21:17:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:17:11,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:11,995 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:12,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:12,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:12,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:12,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash 252831648, now seen corresponding path program 1 times [2023-11-23 21:17:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787476477] [2023-11-23 21:17:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:12,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:12,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961078577] [2023-11-23 21:17:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:12,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:12,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:17:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:12,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:17:12,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:17:14,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:14,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:14,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787476477] [2023-11-23 21:17:14,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961078577] [2023-11-23 21:17:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961078577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:14,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467837486] [2023-11-23 21:17:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2023-11-23 21:17:14,395 INFO L87 Difference]: Start difference. First operand 297 states and 396 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:16,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 21:17:17,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 21:17:19,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 21:17:21,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-23 21:17:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:21,975 INFO L93 Difference]: Finished difference Result 337 states and 417 transitions. [2023-11-23 21:17:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 57 [2023-11-23 21:17:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:21,978 INFO L225 Difference]: With dead ends: 337 [2023-11-23 21:17:21,978 INFO L226 Difference]: Without dead ends: 336 [2023-11-23 21:17:21,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2023-11-23 21:17:21,979 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 114 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:21,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 211 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 4 Unknown, 0 Unchecked, 7.5s Time] [2023-11-23 21:17:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-23 21:17:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 297. [2023-11-23 21:17:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.6415094339622642) internal successors, (348), 271 states have internal predecessors, (348), 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) [2023-11-23 21:17:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 394 transitions. [2023-11-23 21:17:22,010 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 394 transitions. Word has length 57 [2023-11-23 21:17:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:22,011 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 394 transitions. [2023-11-23 21:17:22,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 394 transitions. [2023-11-23 21:17:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:17:22,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:22,012 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:22,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:22,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:22,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:22,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -752153388, now seen corresponding path program 1 times [2023-11-23 21:17:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:22,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324599164] [2023-11-23 21:17:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:22,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693812756] [2023-11-23 21:17:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:22,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:22,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:22,245 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:22,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 21:17:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:22,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:22,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:17:22,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:22,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324599164] [2023-11-23 21:17:22,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:22,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693812756] [2023-11-23 21:17:22,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693812756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:22,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:22,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978832826] [2023-11-23 21:17:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:22,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:22,391 INFO L87 Difference]: Start difference. First operand 297 states and 394 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:22,596 INFO L93 Difference]: Finished difference Result 326 states and 405 transitions. [2023-11-23 21:17:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-23 21:17:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:22,600 INFO L225 Difference]: With dead ends: 326 [2023-11-23 21:17:22,600 INFO L226 Difference]: Without dead ends: 324 [2023-11-23 21:17:22,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:22,601 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 111 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:22,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:17:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-23 21:17:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 297. [2023-11-23 21:17:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.6226415094339623) internal successors, (344), 271 states have internal predecessors, (344), 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) [2023-11-23 21:17:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 390 transitions. [2023-11-23 21:17:22,636 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 390 transitions. Word has length 58 [2023-11-23 21:17:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:22,637 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 390 transitions. [2023-11-23 21:17:22,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 390 transitions. [2023-11-23 21:17:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 21:17:22,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:22,638 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:22,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 21:17:22,852 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:22,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1841918430, now seen corresponding path program 1 times [2023-11-23 21:17:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489635709] [2023-11-23 21:17:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:22,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:22,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121004725] [2023-11-23 21:17:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:22,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:22,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 21:17:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:22,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:22,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:17:23,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:23,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:23,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489635709] [2023-11-23 21:17:23,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:23,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121004725] [2023-11-23 21:17:23,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121004725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:23,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:23,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:23,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478112851] [2023-11-23 21:17:23,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:23,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:23,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:23,008 INFO L87 Difference]: Start difference. First operand 297 states and 390 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:23,370 INFO L93 Difference]: Finished difference Result 324 states and 401 transitions. [2023-11-23 21:17:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2023-11-23 21:17:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:23,373 INFO L225 Difference]: With dead ends: 324 [2023-11-23 21:17:23,374 INFO L226 Difference]: Without dead ends: 322 [2023-11-23 21:17:23,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:23,375 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 63 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:23,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 308 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:17:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-23 21:17:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 297. [2023-11-23 21:17:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.6037735849056605) internal successors, (340), 271 states have internal predecessors, (340), 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) [2023-11-23 21:17:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 386 transitions. [2023-11-23 21:17:23,407 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 386 transitions. Word has length 59 [2023-11-23 21:17:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:23,407 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 386 transitions. [2023-11-23 21:17:23,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:17:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 386 transitions. [2023-11-23 21:17:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 21:17:23,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:23,409 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:23,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:23,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:23,628 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 21:17:23,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash -259304934, now seen corresponding path program 1 times [2023-11-23 21:17:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:23,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199847167] [2023-11-23 21:17:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:23,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:17:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573771562] [2023-11-23 21:17:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:23,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:23,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:23,641 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:23,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668236e1-a65d-4686-8297-ca95807cf6b3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 21:17:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:23,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:17:23,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 21:17:23,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 21:17:24,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:24,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199847167] [2023-11-23 21:17:24,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:17:24,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573771562] [2023-11-23 21:17:24,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573771562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:24,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811974918] [2023-11-23 21:17:24,099 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2023-11-23 21:17:24,099 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:17:24,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:17:24,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:17:24,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:17:26,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-23 21:17:26,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-23 21:17:26,147 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:17:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [811974918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:17:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-11-23 21:17:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869921526] [2023-11-23 21:17:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:17:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:17:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:17:28,811 INFO L87 Difference]: Start difference. First operand 297 states and 386 transitions. Second operand has 16 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 21:17:32,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:17:33,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:17:35,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:17:37,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:17:39,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:17:43,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:17:45,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []