./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.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_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/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_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/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_b127222e-b972-4b5f-a20f-f63ba1d05703/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 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:23:09,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:23:09,309 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 21:23:09,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:23:09,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:23:09,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:23:09,342 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:23:09,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:23:09,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:23:09,344 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:23:09,345 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:23:09,345 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:23:09,346 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:23:09,346 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:23:09,347 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:23:09,348 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:23:09,348 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:23:09,348 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:23:09,349 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:23:09,349 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:23:09,350 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:23:09,351 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:23:09,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:23:09,352 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:23:09,352 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:23:09,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:23:09,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:23:09,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:23:09,354 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:23:09,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:23:09,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:23:09,355 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:23:09,355 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:23:09,356 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:23:09,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:23:09,356 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:23:09,356 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:23:09,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:23:09,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:23:09,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:09,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:23:09,358 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:23:09,358 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:23:09,358 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:23:09,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:23:09,359 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:23:09,359 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:23:09,359 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:23:09,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:23:09,360 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_b127222e-b972-4b5f-a20f-f63ba1d05703/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa [2023-11-23 21:23:09,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:23:09,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:23:09,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:23:09,672 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:23:09,673 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:23:09,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2023-11-23 21:23:12,918 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:13,114 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:13,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2023-11-23 21:23:13,123 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/data/a887d6e34/382653f5c231487a8b8f753c9e0949ab/FLAGba4ae57f6 [2023-11-23 21:23:13,138 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/data/a887d6e34/382653f5c231487a8b8f753c9e0949ab [2023-11-23 21:23:13,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:13,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:13,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:13,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:13,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:13,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bca183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13, skipping insertion in model container [2023-11-23 21:23:13,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,180 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:13,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:13,379 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:13,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:13,412 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:13,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13 WrapperNode [2023-11-23 21:23:13,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:13,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:13,415 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:13,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:13,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,453 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-11-23 21:23:13,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:13,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:13,454 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:13,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:13,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:13,480 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:13,480 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:13,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:13,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (1/1) ... [2023-11-23 21:23:13,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:13,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:13,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:23:13,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:23:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:13,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:13,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:23:13,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:23:13,662 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:13,664 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:13,877 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:13,919 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:13,919 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:23:13,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:13 BoogieIcfgContainer [2023-11-23 21:23:13,921 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:13,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:13,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:13,929 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:13,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:13" (1/3) ... [2023-11-23 21:23:13,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c34c52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:13, skipping insertion in model container [2023-11-23 21:23:13,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:13" (2/3) ... [2023-11-23 21:23:13,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c34c52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:13, skipping insertion in model container [2023-11-23 21:23:13,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:13" (3/3) ... [2023-11-23 21:23:13,933 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2023-11-23 21:23:13,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:13,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-23 21:23:14,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:14,016 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;@2a1473fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:14,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-23 21:23:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:23:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:23:14,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:14,027 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:14,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:14,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -129934665, now seen corresponding path program 1 times [2023-11-23 21:23:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708646573] [2023-11-23 21:23:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:14,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708646573] [2023-11-23 21:23:14,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:23:14,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521314026] [2023-11-23 21:23:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:14,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:14,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:23:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:14,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:23:14,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:14,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:14,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521314026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:14,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:14,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627292629] [2023-11-23 21:23:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:23:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:23:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:23:14,386 INFO L87 Difference]: Start difference. First operand has 60 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:14,415 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-11-23 21:23:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:23:14,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-11-23 21:23:14,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:14,423 INFO L225 Difference]: With dead ends: 73 [2023-11-23 21:23:14,423 INFO L226 Difference]: Without dead ends: 57 [2023-11-23 21:23:14,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:23:14,430 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:14,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-23 21:23:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-23 21:23:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.8) internal successors, (54), 51 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-11-23 21:23:14,469 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 10 [2023-11-23 21:23:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:14,471 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-11-23 21:23:14,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-11-23 21:23:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:23:14,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:14,473 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:14,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:23:14,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:14,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash -129936426, now seen corresponding path program 1 times [2023-11-23 21:23:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117023444] [2023-11-23 21:23:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:14,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:14,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117023444] [2023-11-23 21:23:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117023444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:14,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:14,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237237901] [2023-11-23 21:23:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:14,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:14,907 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:14,970 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2023-11-23 21:23:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:23:14,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-11-23 21:23:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:14,972 INFO L225 Difference]: With dead ends: 71 [2023-11-23 21:23:14,973 INFO L226 Difference]: Without dead ends: 61 [2023-11-23 21:23:14,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:14,975 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:14,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 152 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-23 21:23:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-23 21:23:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 55 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2023-11-23 21:23:14,987 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 10 [2023-11-23 21:23:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:14,987 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2023-11-23 21:23:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2023-11-23 21:23:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:23:14,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:14,989 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:23:14,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:14,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1170489416, now seen corresponding path program 1 times [2023-11-23 21:23:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756973297] [2023-11-23 21:23:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:15,006 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:15,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803504088] [2023-11-23 21:23:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:15,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:15,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:15,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:23:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:15,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:23:15,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:15,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:15,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:15,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756973297] [2023-11-23 21:23:15,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803504088] [2023-11-23 21:23:15,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803504088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:15,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:15,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006034066] [2023-11-23 21:23:15,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:15,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:15,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:15,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:15,104 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:15,195 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2023-11-23 21:23:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-23 21:23:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:15,198 INFO L225 Difference]: With dead ends: 106 [2023-11-23 21:23:15,200 INFO L226 Difference]: Without dead ends: 100 [2023-11-23 21:23:15,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:15,203 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:15,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 73 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-23 21:23:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2023-11-23 21:23:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 77 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:23:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-11-23 21:23:15,221 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 13 [2023-11-23 21:23:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:15,222 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-11-23 21:23:15,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-11-23 21:23:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:23:15,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:15,223 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:15,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:23:15,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:23:15,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:15,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash 441104474, now seen corresponding path program 1 times [2023-11-23 21:23:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:15,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663889223] [2023-11-23 21:23:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:15,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:15,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342512127] [2023-11-23 21:23:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:15,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:15,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:15,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:23:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:15,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:23:15,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:15,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:15,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:15,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663889223] [2023-11-23 21:23:15,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:15,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342512127] [2023-11-23 21:23:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342512127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:15,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:15,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:15,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702964196] [2023-11-23 21:23:15,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:15,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:15,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:15,594 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:15,712 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2023-11-23 21:23:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-11-23 21:23:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:15,718 INFO L225 Difference]: With dead ends: 94 [2023-11-23 21:23:15,719 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 21:23:15,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 21:23:15,725 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:15,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 21:23:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-11-23 21:23:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.564516129032258) internal successors, (97), 79 states have internal predecessors, (97), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:23:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2023-11-23 21:23:15,754 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 15 [2023-11-23 21:23:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:15,755 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2023-11-23 21:23:15,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2023-11-23 21:23:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:23:15,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:15,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:15,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:15,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:15,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash 789336863, now seen corresponding path program 1 times [2023-11-23 21:23:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153388617] [2023-11-23 21:23:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:15,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:15,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504291595] [2023-11-23 21:23:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:15,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:15,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:15,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:16,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:23:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:16,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:23:16,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:16,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:16,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:16,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153388617] [2023-11-23 21:23:16,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:16,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504291595] [2023-11-23 21:23:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504291595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:16,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:16,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:16,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477709536] [2023-11-23 21:23:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:16,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:16,118 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:16,239 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2023-11-23 21:23:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-23 21:23:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:16,242 INFO L225 Difference]: With dead ends: 135 [2023-11-23 21:23:16,242 INFO L226 Difference]: Without dead ends: 124 [2023-11-23 21:23:16,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 21:23:16,244 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:16,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-23 21:23:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2023-11-23 21:23:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4883720930232558) internal successors, (128), 103 states have internal predecessors, (128), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2023-11-23 21:23:16,260 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 16 [2023-11-23 21:23:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:16,261 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2023-11-23 21:23:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2023-11-23 21:23:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:23:16,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:16,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:16,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:16,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:16,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:16,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1300360964, now seen corresponding path program 1 times [2023-11-23 21:23:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:16,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667714778] [2023-11-23 21:23:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:16,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:16,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465484375] [2023-11-23 21:23:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:16,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:16,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:16,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:16,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:23:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:16,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:23:16,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:16,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:16,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:16,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667714778] [2023-11-23 21:23:16,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465484375] [2023-11-23 21:23:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465484375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:16,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:16,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:16,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037811928] [2023-11-23 21:23:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:16,704 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:16,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:16,822 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2023-11-23 21:23:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:16,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-23 21:23:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:16,824 INFO L225 Difference]: With dead ends: 120 [2023-11-23 21:23:16,825 INFO L226 Difference]: Without dead ends: 119 [2023-11-23 21:23:16,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:16,826 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:16,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 48 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-23 21:23:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2023-11-23 21:23:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4767441860465116) internal successors, (127), 103 states have internal predecessors, (127), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2023-11-23 21:23:16,843 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 17 [2023-11-23 21:23:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:16,843 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2023-11-23 21:23:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2023-11-23 21:23:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:23:16,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:16,845 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:16,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:17,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:17,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:17,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1656484159, now seen corresponding path program 1 times [2023-11-23 21:23:17,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:17,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935080188] [2023-11-23 21:23:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:17,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:17,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:17,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639767717] [2023-11-23 21:23:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:17,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:17,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:17,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:23:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:17,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:23:17,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:17,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:17,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935080188] [2023-11-23 21:23:17,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639767717] [2023-11-23 21:23:17,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639767717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:17,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:17,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187446064] [2023-11-23 21:23:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:17,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:17,284 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:17,401 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2023-11-23 21:23:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-23 21:23:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:17,403 INFO L225 Difference]: With dead ends: 115 [2023-11-23 21:23:17,403 INFO L226 Difference]: Without dead ends: 114 [2023-11-23 21:23:17,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:17,407 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:17,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 53 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-23 21:23:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2023-11-23 21:23:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 103 states have internal predecessors, (126), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2023-11-23 21:23:17,444 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 18 [2023-11-23 21:23:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:17,447 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2023-11-23 21:23:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:23:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2023-11-23 21:23:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:23:17,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:17,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:17,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:23:17,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:17,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1921517682, now seen corresponding path program 1 times [2023-11-23 21:23:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:17,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336830012] [2023-11-23 21:23:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:17,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:17,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227142324] [2023-11-23 21:23:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:17,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:17,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:17,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:23:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:17,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:23:17,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:17,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:17,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336830012] [2023-11-23 21:23:17,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227142324] [2023-11-23 21:23:17,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227142324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368754250] [2023-11-23 21:23:17,914 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-23 21:23:17,914 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:17,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:17,924 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:17,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:18,769 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-11-23 21:23:18,789 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:18,859 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:20,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1368754250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:20,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:23:20,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-11-23 21:23:20,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35025305] [2023-11-23 21:23:20,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:20,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:23:20,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:23:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:23:20,457 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:20,971 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2023-11-23 21:23:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:23:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-11-23 21:23:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:20,973 INFO L225 Difference]: With dead ends: 120 [2023-11-23 21:23:20,973 INFO L226 Difference]: Without dead ends: 118 [2023-11-23 21:23:20,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:23:20,974 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:20,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:23:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-23 21:23:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-11-23 21:23:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.449438202247191) internal successors, (129), 106 states have internal predecessors, (129), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2023-11-23 21:23:21,001 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 28 [2023-11-23 21:23:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:21,001 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2023-11-23 21:23:21,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2023-11-23 21:23:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:23:21,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:21,002 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:21,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:21,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:23:21,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:21,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1921825522, now seen corresponding path program 1 times [2023-11-23 21:23:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337750971] [2023-11-23 21:23:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:21,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:21,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960466441] [2023-11-23 21:23:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:21,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:21,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:21,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:23:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:21,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:23:21,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:21,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:21,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:21,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337750971] [2023-11-23 21:23:21,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:21,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960466441] [2023-11-23 21:23:21,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960466441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:21,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399607068] [2023-11-23 21:23:21,428 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-23 21:23:21,428 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:21,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:21,429 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:21,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:21,934 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-11-23 21:23:21,943 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:21,984 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1399607068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:23,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:23:23,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-11-23 21:23:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092660306] [2023-11-23 21:23:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:23:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:23:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:23:23,402 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:23,939 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2023-11-23 21:23:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:23:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-11-23 21:23:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:23,941 INFO L225 Difference]: With dead ends: 122 [2023-11-23 21:23:23,941 INFO L226 Difference]: Without dead ends: 120 [2023-11-23 21:23:23,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:23:23,943 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:23,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 154 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:23:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-23 21:23:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-11-23 21:23:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 110 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2023-11-23 21:23:23,956 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 28 [2023-11-23 21:23:23,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:23,956 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2023-11-23 21:23:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2023-11-23 21:23:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 21:23:23,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:23,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:23,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:23:24,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -609053680, now seen corresponding path program 1 times [2023-11-23 21:23:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442097730] [2023-11-23 21:23:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:24,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:24,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601415655] [2023-11-23 21:23:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:24,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:24,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:24,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:23:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:24,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:23:24,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:24,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:24,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442097730] [2023-11-23 21:23:24,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601415655] [2023-11-23 21:23:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601415655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:24,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:24,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:23:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705678872] [2023-11-23 21:23:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:23:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:23:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:24,302 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:24,335 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2023-11-23 21:23:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:24,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-23 21:23:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:24,337 INFO L225 Difference]: With dead ends: 120 [2023-11-23 21:23:24,337 INFO L226 Difference]: Without dead ends: 119 [2023-11-23 21:23:24,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:24,339 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:24,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 138 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-23 21:23:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-23 21:23:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 109 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2023-11-23 21:23:24,354 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 31 [2023-11-23 21:23:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:24,354 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2023-11-23 21:23:24,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2023-11-23 21:23:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:23:24,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:24,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:24,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:23:24,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:24,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1700794852, now seen corresponding path program 1 times [2023-11-23 21:23:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:24,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328867308] [2023-11-23 21:23:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:24,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:24,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147718960] [2023-11-23 21:23:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:24,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:24,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:24,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:23:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:24,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:23:24,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:24,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:24,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:24,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328867308] [2023-11-23 21:23:24,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:24,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147718960] [2023-11-23 21:23:24,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147718960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:24,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:24,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:23:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393727111] [2023-11-23 21:23:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:24,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:23:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:23:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:24,715 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:24,790 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2023-11-23 21:23:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:23:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-23 21:23:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:24,793 INFO L225 Difference]: With dead ends: 127 [2023-11-23 21:23:24,793 INFO L226 Difference]: Without dead ends: 126 [2023-11-23 21:23:24,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:23:24,795 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 34 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:24,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:24,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-23 21:23:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2023-11-23 21:23:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 93 states have (on average 1.3655913978494623) internal successors, (127), 108 states have internal predecessors, (127), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:23:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-11-23 21:23:24,806 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 32 [2023-11-23 21:23:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:24,807 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-11-23 21:23:24,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2023-11-23 21:23:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:23:24,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:24,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:24,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:23:25,028 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:25,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -336096135, now seen corresponding path program 1 times [2023-11-23 21:23:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:25,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524862272] [2023-11-23 21:23:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:25,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:25,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:25,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739356072] [2023-11-23 21:23:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:25,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:25,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:23:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:25,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:23:25,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:25,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:25,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524862272] [2023-11-23 21:23:25,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739356072] [2023-11-23 21:23:25,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739356072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325480339] [2023-11-23 21:23:25,237 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 21:23:25,238 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:25,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:25,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:25,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:26,891 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-23 21:23:26,907 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:26,940 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:29,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3660#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-11-23 21:23:29,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:29,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:23:29,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-23 21:23:29,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189255965] [2023-11-23 21:23:29,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:29,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:23:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:23:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:23:29,781 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 21:23:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:29,985 INFO L93 Difference]: Finished difference Result 289 states and 340 transitions. [2023-11-23 21:23:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:23:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2023-11-23 21:23:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:29,991 INFO L225 Difference]: With dead ends: 289 [2023-11-23 21:23:29,991 INFO L226 Difference]: Without dead ends: 278 [2023-11-23 21:23:29,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 21:23:29,994 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:29,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 281 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-23 21:23:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 239. [2023-11-23 21:23:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 207 states have (on average 1.396135265700483) internal successors, (289), 222 states have internal predecessors, (289), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:23:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 311 transitions. [2023-11-23 21:23:30,015 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 311 transitions. Word has length 34 [2023-11-23 21:23:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:30,015 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 311 transitions. [2023-11-23 21:23:30,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 21:23:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 311 transitions. [2023-11-23 21:23:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:23:30,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:30,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:30,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:30,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:23:30,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:30,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -336096120, now seen corresponding path program 1 times [2023-11-23 21:23:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901840072] [2023-11-23 21:23:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:30,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:30,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226696982] [2023-11-23 21:23:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:30,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:30,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:30,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:30,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:23:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:30,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:23:30,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:30,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:30,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:30,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901840072] [2023-11-23 21:23:30,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:30,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226696982] [2023-11-23 21:23:30,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226696982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61845310] [2023-11-23 21:23:30,644 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:23:30,645 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:30,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:30,645 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:30,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:32,092 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-23 21:23:32,107 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:32,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:34,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4430#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 4294967294) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= ~counter~0 20) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y1~0#1| 2147483646)))' at error location [2023-11-23 21:23:34,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:34,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:23:34,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-11-23 21:23:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651035976] [2023-11-23 21:23:34,541 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:34,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-11-23 21:23:34,543 INFO L87 Difference]: Start difference. First operand 239 states and 311 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:34,713 INFO L93 Difference]: Finished difference Result 249 states and 313 transitions. [2023-11-23 21:23:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:23:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-11-23 21:23:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:34,716 INFO L225 Difference]: With dead ends: 249 [2023-11-23 21:23:34,717 INFO L226 Difference]: Without dead ends: 246 [2023-11-23 21:23:34,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:23:34,720 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 111 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:34,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 53 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-23 21:23:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2023-11-23 21:23:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 207 states have (on average 1.3623188405797102) internal successors, (282), 219 states have internal predecessors, (282), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:23:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 304 transitions. [2023-11-23 21:23:34,741 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 304 transitions. Word has length 34 [2023-11-23 21:23:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:34,741 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 304 transitions. [2023-11-23 21:23:34,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 304 transitions. [2023-11-23 21:23:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:23:34,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:34,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:34,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:34,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1829045075, now seen corresponding path program 1 times [2023-11-23 21:23:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:34,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300362032] [2023-11-23 21:23:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:34,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:34,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010917990] [2023-11-23 21:23:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:34,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:34,978 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:34,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:23:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:35,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:23:35,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:35,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:35,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300362032] [2023-11-23 21:23:35,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010917990] [2023-11-23 21:23:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010917990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479636961] [2023-11-23 21:23:35,400 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:23:35,400 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:35,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:35,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:35,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:36,895 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-23 21:23:36,907 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:36,938 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:39,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5152#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-11-23 21:23:39,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:39,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:23:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-11-23 21:23:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947308340] [2023-11-23 21:23:39,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:39,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2023-11-23 21:23:39,497 INFO L87 Difference]: Start difference. First operand 236 states and 304 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:39,699 INFO L93 Difference]: Finished difference Result 338 states and 419 transitions. [2023-11-23 21:23:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:23:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-23 21:23:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:39,701 INFO L225 Difference]: With dead ends: 338 [2023-11-23 21:23:39,702 INFO L226 Difference]: Without dead ends: 333 [2023-11-23 21:23:39,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:23:39,703 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 91 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:39,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 106 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:23:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-23 21:23:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 301. [2023-11-23 21:23:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 269 states have (on average 1.3494423791821561) internal successors, (363), 281 states have internal predecessors, (363), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:23:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 391 transitions. [2023-11-23 21:23:39,730 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 391 transitions. Word has length 35 [2023-11-23 21:23:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:39,730 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 391 transitions. [2023-11-23 21:23:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 391 transitions. [2023-11-23 21:23:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:23:39,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:39,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:39,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:39,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:39,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:39,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2068381735, now seen corresponding path program 1 times [2023-11-23 21:23:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414397395] [2023-11-23 21:23:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:39,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:39,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674328055] [2023-11-23 21:23:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:39,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:39,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:39,958 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:39,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:23:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:39,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:23:40,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:40,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:40,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414397395] [2023-11-23 21:23:40,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674328055] [2023-11-23 21:23:40,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674328055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445681648] [2023-11-23 21:23:40,179 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:23:40,180 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:40,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:40,180 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:40,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:41,282 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-23 21:23:41,290 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:41,321 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:43,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6050#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 2147483648 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-11-23 21:23:43,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:43,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:23:43,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2023-11-23 21:23:43,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367986316] [2023-11-23 21:23:43,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:43,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:43,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:23:43,226 INFO L87 Difference]: Start difference. First operand 301 states and 391 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:43,338 INFO L93 Difference]: Finished difference Result 311 states and 395 transitions. [2023-11-23 21:23:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:43,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-11-23 21:23:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:43,341 INFO L225 Difference]: With dead ends: 311 [2023-11-23 21:23:43,341 INFO L226 Difference]: Without dead ends: 303 [2023-11-23 21:23:43,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:23:43,345 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:43,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-23 21:23:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2023-11-23 21:23:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 269 states have (on average 1.3345724907063197) internal successors, (359), 281 states have internal predecessors, (359), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:23:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 387 transitions. [2023-11-23 21:23:43,370 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 387 transitions. Word has length 37 [2023-11-23 21:23:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:43,371 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 387 transitions. [2023-11-23 21:23:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 387 transitions. [2023-11-23 21:23:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:23:43,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:43,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:43,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:43,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:43,593 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:43,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:43,593 INFO L85 PathProgramCache]: Analyzing trace with hash 304675714, now seen corresponding path program 1 times [2023-11-23 21:23:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:43,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65627445] [2023-11-23 21:23:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:43,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:43,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669070023] [2023-11-23 21:23:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:43,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:43,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:43,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:23:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:43,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:23:43,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:43,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:43,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65627445] [2023-11-23 21:23:43,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669070023] [2023-11-23 21:23:43,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669070023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:43,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:43,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:43,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525396999] [2023-11-23 21:23:43,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:43,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:43,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:43,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:43,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:43,694 INFO L87 Difference]: Start difference. First operand 301 states and 387 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:43,781 INFO L93 Difference]: Finished difference Result 304 states and 387 transitions. [2023-11-23 21:23:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:43,782 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-11-23 21:23:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:43,784 INFO L225 Difference]: With dead ends: 304 [2023-11-23 21:23:43,785 INFO L226 Difference]: Without dead ends: 303 [2023-11-23 21:23:43,785 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 21:23:43,786 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:43,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-23 21:23:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2023-11-23 21:23:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 269 states have (on average 1.312267657992565) internal successors, (353), 281 states have internal predecessors, (353), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:23:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 381 transitions. [2023-11-23 21:23:43,811 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 381 transitions. Word has length 38 [2023-11-23 21:23:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:43,811 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 381 transitions. [2023-11-23 21:23:43,812 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 381 transitions. [2023-11-23 21:23:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:23:43,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:43,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:43,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:44,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:44,020 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:44,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1168309708, now seen corresponding path program 1 times [2023-11-23 21:23:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:44,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543653973] [2023-11-23 21:23:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:44,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:44,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:44,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500289014] [2023-11-23 21:23:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:44,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:44,033 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:44,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:23:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:44,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:23:44,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:44,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:23:44,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543653973] [2023-11-23 21:23:44,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500289014] [2023-11-23 21:23:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500289014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:44,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318887439] [2023-11-23 21:23:44,409 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:23:44,409 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:44,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:44,410 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:44,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:45,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-23 21:23:45,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:45,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:48,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7777#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y3~0#1|) 0) (<= 1 ~counter~0) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-11-23 21:23:48,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:48,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:23:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-23 21:23:48,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356644470] [2023-11-23 21:23:48,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:48,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:23:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:48,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:23:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:23:48,186 INFO L87 Difference]: Start difference. First operand 301 states and 381 transitions. Second operand has 12 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:48,439 INFO L93 Difference]: Finished difference Result 301 states and 381 transitions. [2023-11-23 21:23:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:23:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-11-23 21:23:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:48,442 INFO L225 Difference]: With dead ends: 301 [2023-11-23 21:23:48,442 INFO L226 Difference]: Without dead ends: 298 [2023-11-23 21:23:48,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:23:48,444 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:48,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 54 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-23 21:23:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2023-11-23 21:23:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 269 states have (on average 1.245353159851301) internal successors, (335), 278 states have internal predecessors, (335), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:23:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 363 transitions. [2023-11-23 21:23:48,466 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 363 transitions. Word has length 38 [2023-11-23 21:23:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:48,467 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 363 transitions. [2023-11-23 21:23:48,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:23:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 363 transitions. [2023-11-23 21:23:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:23:48,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:48,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:48,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:48,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:23:48,684 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:48,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 855012603, now seen corresponding path program 1 times [2023-11-23 21:23:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714186669] [2023-11-23 21:23:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:48,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:48,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308434041] [2023-11-23 21:23:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:48,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:48,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:48,693 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:48,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:23:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:48,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:23:48,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:48,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:48,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714186669] [2023-11-23 21:23:48,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308434041] [2023-11-23 21:23:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308434041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:48,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754080800] [2023-11-23 21:23:48,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:48,785 INFO L87 Difference]: Start difference. First operand 298 states and 363 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:48,871 INFO L93 Difference]: Finished difference Result 301 states and 363 transitions. [2023-11-23 21:23:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:48,872 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-11-23 21:23:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:48,874 INFO L225 Difference]: With dead ends: 301 [2023-11-23 21:23:48,874 INFO L226 Difference]: Without dead ends: 300 [2023-11-23 21:23:48,875 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 21:23:48,875 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:48,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 47 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-23 21:23:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2023-11-23 21:23:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 269 states have (on average 1.2230483271375465) internal successors, (329), 278 states have internal predecessors, (329), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:23:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 357 transitions. [2023-11-23 21:23:48,899 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 357 transitions. Word has length 39 [2023-11-23 21:23:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:48,900 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 357 transitions. [2023-11-23 21:23:48,900 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:23:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 357 transitions. [2023-11-23 21:23:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:23:48,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:48,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:48,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:49,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 21:23:49,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:49,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1857862641, now seen corresponding path program 1 times [2023-11-23 21:23:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:49,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178595472] [2023-11-23 21:23:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:49,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799122870] [2023-11-23 21:23:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:49,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:49,113 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:49,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 21:23:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:49,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:23:49,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:49,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:23:49,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178595472] [2023-11-23 21:23:49,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799122870] [2023-11-23 21:23:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799122870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700142793] [2023-11-23 21:23:49,478 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:23:49,478 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:49,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:49,479 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:49,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:50,495 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-23 21:23:50,507 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:50,541 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:52,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9501#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y3~0#1|)) (<= 1 ~counter~0) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-11-23 21:23:52,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:52,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:23:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-23 21:23:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191278747] [2023-11-23 21:23:52,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:52,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:23:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:23:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:23:52,895 INFO L87 Difference]: Start difference. First operand 298 states and 357 transitions. Second operand has 11 states, 10 states have (on average 6.1) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:23:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:53,517 INFO L93 Difference]: Finished difference Result 394 states and 469 transitions. [2023-11-23 21:23:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:23:53,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2023-11-23 21:23:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:53,521 INFO L225 Difference]: With dead ends: 394 [2023-11-23 21:23:53,521 INFO L226 Difference]: Without dead ends: 276 [2023-11-23 21:23:53,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 21:23:53,524 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:53,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 74 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:23:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-11-23 21:23:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2023-11-23 21:23:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 249 states have (on average 1.1927710843373494) internal successors, (297), 257 states have internal predecessors, (297), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 21:23:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 323 transitions. [2023-11-23 21:23:53,549 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 323 transitions. Word has length 39 [2023-11-23 21:23:53,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:53,549 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 323 transitions. [2023-11-23 21:23:53,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:23:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 323 transitions. [2023-11-23 21:23:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:23:53,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:53,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:53,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:53,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:53,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -289911788, now seen corresponding path program 1 times [2023-11-23 21:23:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567331386] [2023-11-23 21:23:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:53,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:53,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829557144] [2023-11-23 21:23:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:53,783 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:53,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 21:23:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:53,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:23:53,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:23:53,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:53,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:53,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567331386] [2023-11-23 21:23:53,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:53,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829557144] [2023-11-23 21:23:53,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829557144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:53,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:23:53,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586511725] [2023-11-23 21:23:53,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:53,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:53,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:53,858 INFO L87 Difference]: Start difference. First operand 276 states and 323 transitions. Second operand has 3 states, 2 states have (on average 20.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:23:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:53,892 INFO L93 Difference]: Finished difference Result 276 states and 323 transitions. [2023-11-23 21:23:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:53,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-11-23 21:23:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:53,895 INFO L225 Difference]: With dead ends: 276 [2023-11-23 21:23:53,895 INFO L226 Difference]: Without dead ends: 274 [2023-11-23 21:23:53,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 21:23:53,896 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:53,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-23 21:23:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2023-11-23 21:23:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 249 states have (on average 1.144578313253012) internal successors, (285), 255 states have internal predecessors, (285), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 21:23:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2023-11-23 21:23:53,919 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 50 [2023-11-23 21:23:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:53,919 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2023-11-23 21:23:53,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:23:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2023-11-23 21:23:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:23:53,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:53,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:53,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:54,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:54,142 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:23:54,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:54,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1370248573, now seen corresponding path program 2 times [2023-11-23 21:23:54,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896491674] [2023-11-23 21:23:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:54,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:23:54,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674893704] [2023-11-23 21:23:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:23:54,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:54,156 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:54,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 21:23:55,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:23:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:23:55,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:23:55,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:23:55,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:55,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896491674] [2023-11-23 21:23:55,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:23:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674893704] [2023-11-23 21:23:55,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674893704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013823562] [2023-11-23 21:23:55,524 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:23:55,524 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:55,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:55,525 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:55,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:56,668 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-11-23 21:23:56,679 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:23:56,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:59,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11273#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-11-23 21:23:59,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:59,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:23:59,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-23 21:23:59,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100646974] [2023-11-23 21:23:59,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:59,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:23:59,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:23:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:23:59,560 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 9 states have internal predecessors, (47), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:24:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:00,116 INFO L93 Difference]: Finished difference Result 329 states and 376 transitions. [2023-11-23 21:24:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:24:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 9 states have internal predecessors, (47), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2023-11-23 21:24:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:00,119 INFO L225 Difference]: With dead ends: 329 [2023-11-23 21:24:00,119 INFO L226 Difference]: Without dead ends: 326 [2023-11-23 21:24:00,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:24:00,121 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:00,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 198 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-23 21:24:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 245. [2023-11-23 21:24:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 221 states have (on average 1.1493212669683257) internal successors, (254), 227 states have internal predecessors, (254), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:24:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 278 transitions. [2023-11-23 21:24:00,146 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 278 transitions. Word has length 56 [2023-11-23 21:24:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:00,147 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 278 transitions. [2023-11-23 21:24:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 9 states have internal predecessors, (47), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:24:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 278 transitions. [2023-11-23 21:24:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:24:00,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:00,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:00,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:00,381 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:24:00,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash -740725921, now seen corresponding path program 2 times [2023-11-23 21:24:00,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:00,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543957485] [2023-11-23 21:24:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:00,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:00,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848928022] [2023-11-23 21:24:00,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:00,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:00,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:00,399 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 21:24:00,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:00,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:00,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:24:00,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:24:00,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:00,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:00,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543957485] [2023-11-23 21:24:00,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:00,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848928022] [2023-11-23 21:24:00,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848928022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:00,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:00,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:24:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231412704] [2023-11-23 21:24:00,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:00,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:00,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:00,567 INFO L87 Difference]: Start difference. First operand 245 states and 278 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:24:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:00,649 INFO L93 Difference]: Finished difference Result 255 states and 284 transitions. [2023-11-23 21:24:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:00,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2023-11-23 21:24:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:00,651 INFO L225 Difference]: With dead ends: 255 [2023-11-23 21:24:00,652 INFO L226 Difference]: Without dead ends: 248 [2023-11-23 21:24:00,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:00,655 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:00,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 58 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-23 21:24:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2023-11-23 21:24:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 209 states have (on average 1.1148325358851674) internal successors, (233), 216 states have internal predecessors, (233), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:24:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 257 transitions. [2023-11-23 21:24:00,681 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 257 transitions. Word has length 58 [2023-11-23 21:24:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:00,681 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 257 transitions. [2023-11-23 21:24:00,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:24:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 257 transitions. [2023-11-23 21:24:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:24:00,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:00,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:00,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:00,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:00,901 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:24:00,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash 55060426, now seen corresponding path program 1 times [2023-11-23 21:24:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:00,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011331556] [2023-11-23 21:24:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:00,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:00,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645249990] [2023-11-23 21:24:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:00,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:00,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:00,914 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:00,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 21:24:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:00,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:24:00,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:24:01,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:24:01,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011331556] [2023-11-23 21:24:01,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645249990] [2023-11-23 21:24:01,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645249990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [361770032] [2023-11-23 21:24:01,204 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:24:01,204 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:01,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:01,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:01,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:02,209 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-23 21:24:02,215 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-23 21:24:02,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:04,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13070#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-11-23 21:24:04,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:24:04,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:24:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-23 21:24:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033112048] [2023-11-23 21:24:04,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:24:04,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:24:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:04,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:24:04,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:24:04,393 INFO L87 Difference]: Start difference. First operand 233 states and 257 transitions. Second operand has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 8 states have internal predecessors, (103), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-23 21:24:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:04,593 INFO L93 Difference]: Finished difference Result 563 states and 650 transitions. [2023-11-23 21:24:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:24:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 8 states have internal predecessors, (103), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 66 [2023-11-23 21:24:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:04,597 INFO L225 Difference]: With dead ends: 563 [2023-11-23 21:24:04,598 INFO L226 Difference]: Without dead ends: 561 [2023-11-23 21:24:04,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:24:04,599 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 89 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:04,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 157 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-23 21:24:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 476. [2023-11-23 21:24:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 440 states have (on average 1.1545454545454545) internal successors, (508), 445 states have internal predecessors, (508), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:24:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 558 transitions. [2023-11-23 21:24:04,646 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 558 transitions. Word has length 66 [2023-11-23 21:24:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:04,646 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 558 transitions. [2023-11-23 21:24:04,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 8 states have internal predecessors, (103), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-23 21:24:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 558 transitions. [2023-11-23 21:24:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 21:24:04,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:04,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:04,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:04,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:04,872 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:24:04,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:04,872 INFO L85 PathProgramCache]: Analyzing trace with hash -23445449, now seen corresponding path program 1 times [2023-11-23 21:24:04,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:04,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747796343] [2023-11-23 21:24:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:04,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:04,894 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:04,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488316288] [2023-11-23 21:24:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:04,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:04,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:04,900 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:04,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b127222e-b972-4b5f-a20f-f63ba1d05703/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 21:24:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:04,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:24:04,965 INFO L285 TraceCheckSpWp]: Computing forward predicates...