./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh --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 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:00:44,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:00:44,354 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 13:00:44,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:00:44,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:00:44,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:00:44,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:00:44,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:00:44,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:00:44,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:00:44,383 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:00:44,384 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:00:44,384 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:00:44,385 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:00:44,385 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:00:44,386 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:00:44,386 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:00:44,387 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:00:44,387 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:00:44,388 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:00:44,388 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:00:44,389 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:00:44,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:00:44,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:00:44,391 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:00:44,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:00:44,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:00:44,392 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:00:44,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:00:44,393 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:00:44,394 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:00:44,394 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 13:00:44,394 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:00:44,395 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:00:44,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:00:44,395 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:00:44,395 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:00:44,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:00:44,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:00:44,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:00:44,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:00:44,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:00:44,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:00:44,397 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:00:44,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:00:44,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:00:44,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:00:44,397 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:00:44,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:00:44,398 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_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 [2023-12-02 13:00:44,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:00:44,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:00:44,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:00:44,634 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:00:44,635 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:00:44,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound20.c [2023-12-02 13:00:47,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:00:47,571 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:00:47,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound20.c [2023-12-02 13:00:47,579 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/data/659c4ed32/0d40a7355c8943ec92a296c8905fd7a2/FLAG6303f5d52 [2023-12-02 13:00:47,594 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/data/659c4ed32/0d40a7355c8943ec92a296c8905fd7a2 [2023-12-02 13:00:47,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:00:47,598 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:00:47,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:00:47,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:00:47,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:00:47,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a094338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47, skipping insertion in model container [2023-12-02 13:00:47,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,627 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:00:47,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:00:47,800 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:00:47,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:00:47,831 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:00:47,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47 WrapperNode [2023-12-02 13:00:47,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:00:47,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:00:47,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:00:47,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:00:47,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,847 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,864 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-12-02 13:00:47,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:00:47,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:00:47,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:00:47,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:00:47,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:00:47,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:00:47,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:00:47,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:00:47,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (1/1) ... [2023-12-02 13:00:47,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:00:47,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:47,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:00:47,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:00:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:00:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:00:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:00:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:00:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:00:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:00:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:00:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:00:48,015 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:00:48,017 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:00:48,192 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:00:48,231 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:00:48,231 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:00:48,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:00:48 BoogieIcfgContainer [2023-12-02 13:00:48,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:00:48,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:00:48,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:00:48,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:00:48,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:00:47" (1/3) ... [2023-12-02 13:00:48,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cb0409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:00:48, skipping insertion in model container [2023-12-02 13:00:48,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:00:47" (2/3) ... [2023-12-02 13:00:48,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cb0409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:00:48, skipping insertion in model container [2023-12-02 13:00:48,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:00:48" (3/3) ... [2023-12-02 13:00:48,243 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound20.c [2023-12-02 13:00:48,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:00:48,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-12-02 13:00:48,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:00:48,306 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;@445d08a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:00:48,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 13:00:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 48 states have internal predecessors, (51), 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) [2023-12-02 13:00:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:00:48,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:48,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:48,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:48,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash 885391590, now seen corresponding path program 1 times [2023-12-02 13:00:48,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:48,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431841948] [2023-12-02 13:00:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:48,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:48,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:48,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431841948] [2023-12-02 13:00:48,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 13:00:48,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418805967] [2023-12-02 13:00:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:48,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:48,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:00:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:48,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:00:48,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:00:48,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:00:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418805967] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:48,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:48,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:00:48,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77638171] [2023-12-02 13:00:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:48,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:00:48,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:00:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:00:48,565 INFO L87 Difference]: Start difference. First operand has 55 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 48 states have internal predecessors, (51), 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) [2023-12-02 13:00:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:48,589 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2023-12-02 13:00:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:00:48,591 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 [2023-12-02 13:00:48,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:48,596 INFO L225 Difference]: With dead ends: 68 [2023-12-02 13:00:48,596 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 13:00:48,599 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 [2023-12-02 13:00:48,602 INFO L413 NwaCegarLoop]: 54 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, 54 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 [2023-12-02 13:00:48,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:00:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 13:00:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 13:00:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 46 states have internal predecessors, (48), 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) [2023-12-02 13:00:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-12-02 13:00:48,644 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 10 [2023-12-02 13:00:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:48,645 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-12-02 13:00:48,646 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) [2023-12-02 13:00:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-12-02 13:00:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:00:48,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:48,647 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:48,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:00:48,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 13:00:48,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:48,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 885388443, now seen corresponding path program 1 times [2023-12-02 13:00:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888200370] [2023-12-02 13:00:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:48,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:48,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034909326] [2023-12-02 13:00:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:48,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:48,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:00:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:48,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:00:48,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:49,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:00:49,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:49,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888200370] [2023-12-02 13:00:49,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:49,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034909326] [2023-12-02 13:00:49,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034909326] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:49,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:49,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:00:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543793390] [2023-12-02 13:00:49,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:49,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:00:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:00:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:00:49,059 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:00:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:49,194 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-12-02 13:00:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:00:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 13:00:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:49,197 INFO L225 Difference]: With dead ends: 92 [2023-12-02 13:00:49,197 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 13:00:49,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:00:49,199 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 186 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:49,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 72 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:00:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 13:00:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2023-12-02 13:00:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 65 states have internal predecessors, (79), 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) [2023-12-02 13:00:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-12-02 13:00:49,213 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 10 [2023-12-02 13:00:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:49,214 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-12-02 13:00:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:00:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-12-02 13:00:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 13:00:49,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:49,215 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:49,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:00:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 13:00:49,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:49,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 454770653, now seen corresponding path program 1 times [2023-12-02 13:00:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38598139] [2023-12-02 13:00:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:49,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699557283] [2023-12-02 13:00:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:49,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:49,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:00:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:49,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:00:49,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:00:49,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:00:49,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:49,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38598139] [2023-12-02 13:00:49,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699557283] [2023-12-02 13:00:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699557283] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:49,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:49,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:00:49,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562928133] [2023-12-02 13:00:49,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:00:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:00:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:00:49,514 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:00:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:49,577 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2023-12-02 13:00:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:00:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2023-12-02 13:00:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:49,579 INFO L225 Difference]: With dead ends: 75 [2023-12-02 13:00:49,579 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 13:00:49,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:00:49,581 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:49,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:00:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 13:00:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 13:00:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 62 states have internal predecessors, (73), 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) [2023-12-02 13:00:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-12-02 13:00:49,594 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 12 [2023-12-02 13:00:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:49,594 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-12-02 13:00:49,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:00:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-12-02 13:00:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:00:49,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:49,595 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:49,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:00:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 13:00:49,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1212988407, now seen corresponding path program 1 times [2023-12-02 13:00:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409891608] [2023-12-02 13:00:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:49,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725243808] [2023-12-02 13:00:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:49,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:49,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:49,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:49,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:00:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:49,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:00:49,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:00:49,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:00:49,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409891608] [2023-12-02 13:00:49,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725243808] [2023-12-02 13:00:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725243808] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:49,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:49,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:00:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811291936] [2023-12-02 13:00:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:00:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:00:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:00:49,871 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2023-12-02 13:00:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:49,958 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-12-02 13:00:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:00:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2023-12-02 13:00:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:49,960 INFO L225 Difference]: With dead ends: 115 [2023-12-02 13:00:49,961 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 13:00:49,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:00:49,962 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:49,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:00:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 13:00:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2023-12-02 13:00:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 86 states have internal predecessors, (104), 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) [2023-12-02 13:00:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2023-12-02 13:00:49,979 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 13 [2023-12-02 13:00:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:49,979 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2023-12-02 13:00:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2023-12-02 13:00:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2023-12-02 13:00:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 13:00:49,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:49,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:49,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:00:50,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:50,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:50,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1052064993, now seen corresponding path program 1 times [2023-12-02 13:00:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:50,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635311881] [2023-12-02 13:00:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:50,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:50,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39740900] [2023-12-02 13:00:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:50,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:50,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:50,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:50,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:00:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:50,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:00:50,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:50,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:50,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:50,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635311881] [2023-12-02 13:00:50,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:50,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39740900] [2023-12-02 13:00:50,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39740900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:00:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416176033] [2023-12-02 13:00:50,493 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:00:50,494 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:00:50,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:00:50,502 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:00:50,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:00:50,909 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:00:50,960 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:00:51,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [416176033] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:51,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:00:51,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-12-02 13:00:51,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624631738] [2023-12-02 13:00:51,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:51,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:00:51,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:00:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:00:51,505 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:00:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:51,736 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2023-12-02 13:00:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:00:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-12-02 13:00:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:51,738 INFO L225 Difference]: With dead ends: 99 [2023-12-02 13:00:51,738 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 13:00:51,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:00:51,740 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:51,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:00:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 13:00:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-02 13:00:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 86 states have internal predecessors, (102), 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) [2023-12-02 13:00:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2023-12-02 13:00:51,761 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 14 [2023-12-02 13:00:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:51,761 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2023-12-02 13:00:51,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:00:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2023-12-02 13:00:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:00:51,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:51,763 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:51,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:00:51,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:51,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:51,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1837019302, now seen corresponding path program 1 times [2023-12-02 13:00:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040014069] [2023-12-02 13:00:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:51,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:51,976 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:51,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444323269] [2023-12-02 13:00:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:51,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:51,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:51,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:00:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:52,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:00:52,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:52,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:52,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040014069] [2023-12-02 13:00:52,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444323269] [2023-12-02 13:00:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444323269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:00:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1073262571] [2023-12-02 13:00:52,123 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 13:00:52,123 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:00:52,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:00:52,124 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:00:52,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:00:52,441 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 13:00:52,450 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:00:52,494 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:00:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1073262571] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:53,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:00:53,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 13:00:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800837324] [2023-12-02 13:00:53,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:53,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:00:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:00:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:00:53,486 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-12-02 13:00:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:53,821 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-12-02 13:00:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:00:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 25 [2023-12-02 13:00:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:53,823 INFO L225 Difference]: With dead ends: 103 [2023-12-02 13:00:53,823 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 13:00:53,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:00:53,824 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:53,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 43 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:00:53,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 13:00:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-12-02 13:00:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.4) internal successors, (105), 89 states have internal predecessors, (105), 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) [2023-12-02 13:00:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-12-02 13:00:53,840 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-12-02 13:00:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:53,840 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-12-02 13:00:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-12-02 13:00:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-12-02 13:00:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:00:53,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:53,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:53,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:00:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:54,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:54,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1836711462, now seen corresponding path program 1 times [2023-12-02 13:00:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602692501] [2023-12-02 13:00:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:54,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:54,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728761847] [2023-12-02 13:00:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:54,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:54,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:54,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:00:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:54,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:00:54,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:54,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:00:54,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:54,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602692501] [2023-12-02 13:00:54,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728761847] [2023-12-02 13:00:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728761847] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:00:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263402626] [2023-12-02 13:00:54,184 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 13:00:54,184 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:00:54,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:00:54,185 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:00:54,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:00:54,406 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 13:00:54,412 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:00:54,434 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:00:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1263402626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:55,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:00:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 13:00:55,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738736724] [2023-12-02 13:00:55,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:55,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:00:55,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:00:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:00:55,197 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-12-02 13:00:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:55,549 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-12-02 13:00:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:00:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 25 [2023-12-02 13:00:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:55,550 INFO L225 Difference]: With dead ends: 105 [2023-12-02 13:00:55,550 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 13:00:55,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:00:55,551 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:55,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:00:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 13:00:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-02 13:00:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.379746835443038) internal successors, (109), 93 states have internal predecessors, (109), 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) [2023-12-02 13:00:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-12-02 13:00:55,564 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 25 [2023-12-02 13:00:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:55,564 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-12-02 13:00:55,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-12-02 13:00:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-12-02 13:00:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:00:55,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:55,566 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] [2023-12-02 13:00:55,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:00:55,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 13:00:55,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:55,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -412111191, now seen corresponding path program 1 times [2023-12-02 13:00:55,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:55,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34576282] [2023-12-02 13:00:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:55,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:55,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:55,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692295637] [2023-12-02 13:00:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:55,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:55,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:55,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:00:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:55,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:00:55,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:00:55,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:56,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:56,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34576282] [2023-12-02 13:00:56,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692295637] [2023-12-02 13:00:56,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692295637] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:00:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832242288] [2023-12-02 13:00:56,050 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:00:56,050 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:00:56,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:00:56,051 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:00:56,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:00:56,972 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:00:56,982 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:00:57,004 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:00:58,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2127#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 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 [2023-12-02 13:00:58,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:00:58,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:00:58,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 13:00:58,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802882435] [2023-12-02 13:00:58,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:00:58,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:00:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:00:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:00:58,155 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-12-02 13:00:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:58,270 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-12-02 13:00:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:00:58,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 28 [2023-12-02 13:00:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:58,271 INFO L225 Difference]: With dead ends: 113 [2023-12-02 13:00:58,271 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 13:00:58,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:00:58,273 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:58,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:00:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 13:00:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-12-02 13:00:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 91 states have internal predecessors, (107), 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) [2023-12-02 13:00:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-12-02 13:00:58,286 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 28 [2023-12-02 13:00:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:58,286 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-12-02 13:00:58,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-12-02 13:00:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-12-02 13:00:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:00:58,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:58,287 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] [2023-12-02 13:00:58,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:00:58,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 13:00:58,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:00:58,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 109455015, now seen corresponding path program 1 times [2023-12-02 13:00:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:58,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298769950] [2023-12-02 13:00:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:58,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:58,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:00:58,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031751815] [2023-12-02 13:00:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:58,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:58,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:00:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:58,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:00:58,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:00:58,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:58,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298769950] [2023-12-02 13:00:58,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031751815] [2023-12-02 13:00:58,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031751815] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:00:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765050863] [2023-12-02 13:00:58,741 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:00:58,741 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:00:58,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:00:58,742 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:00:58,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:00:59,424 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:00:59,438 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:00:59,469 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:01,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 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 [2023-12-02 13:01:01,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:01,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:01:01,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 13:01:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883907743] [2023-12-02 13:01:01,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:01:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:01:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:01:01,588 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2023-12-02 13:01:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:01,694 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2023-12-02 13:01:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:01:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 29 [2023-12-02 13:01:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:01,696 INFO L225 Difference]: With dead ends: 162 [2023-12-02 13:01:01,696 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 13:01:01,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-12-02 13:01:01,697 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:01,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 89 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 13:01:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2023-12-02 13:01:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 123 states have internal predecessors, (153), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 13:01:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2023-12-02 13:01:01,709 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 29 [2023-12-02 13:01:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:01,709 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2023-12-02 13:01:01,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2023-12-02 13:01:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2023-12-02 13:01:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 13:01:01,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:01,710 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] [2023-12-02 13:01:01,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:01:01,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:01,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:01,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash 66873311, now seen corresponding path program 1 times [2023-12-02 13:01:01,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:01,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869577677] [2023-12-02 13:01:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:01,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:01,919 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:01,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233099910] [2023-12-02 13:01:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:01,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:01,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:01,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:01:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:01,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:01:01,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:01:02,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:01:02,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869577677] [2023-12-02 13:01:02,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233099910] [2023-12-02 13:01:02,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233099910] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439515104] [2023-12-02 13:01:02,102 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:02,103 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:02,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:02,103 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:02,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:02,995 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:01:03,004 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:03,022 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1439515104] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:01:03,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:03,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 7] total 24 [2023-12-02 13:01:03,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499028229] [2023-12-02 13:01:03,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:01:03,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:01:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:01:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-12-02 13:01:03,981 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2023-12-02 13:01:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:05,424 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2023-12-02 13:01:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 13:01:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 31 [2023-12-02 13:01:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:05,426 INFO L225 Difference]: With dead ends: 147 [2023-12-02 13:01:05,426 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 13:01:05,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 13:01:05,427 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:05,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 64 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:01:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 13:01:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2023-12-02 13:01:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.3364485981308412) internal successors, (143), 119 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 13:01:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2023-12-02 13:01:05,436 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 31 [2023-12-02 13:01:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:05,437 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2023-12-02 13:01:05,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2023-12-02 13:01:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2023-12-02 13:01:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 13:01:05,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:05,438 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] [2023-12-02 13:01:05,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:01:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:05,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:05,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash 894223917, now seen corresponding path program 1 times [2023-12-02 13:01:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610739828] [2023-12-02 13:01:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:05,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:05,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:05,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254704572] [2023-12-02 13:01:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:05,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:05,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:05,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:01:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:05,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:01:05,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:01:05,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:01:05,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610739828] [2023-12-02 13:01:05,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254704572] [2023-12-02 13:01:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254704572] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40033076] [2023-12-02 13:01:05,935 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:05,935 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:05,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:05,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:05,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:06,572 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:01:06,582 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:06,601 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:08,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3604#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (= |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) (<= 0 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483648)) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:01:08,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:08,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 13:01:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796584182] [2023-12-02 13:01:08,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:01:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:01:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:01:08,109 INFO L87 Difference]: Start difference. First operand 131 states and 159 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 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) [2023-12-02 13:01:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:08,266 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2023-12-02 13:01:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:01:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 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 32 [2023-12-02 13:01:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:08,267 INFO L225 Difference]: With dead ends: 131 [2023-12-02 13:01:08,268 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 13:01:08,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:01:08,269 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:08,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 13:01:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-12-02 13:01:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 116 states have internal predecessors, (135), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 13:01:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2023-12-02 13:01:08,280 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 32 [2023-12-02 13:01:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:08,281 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2023-12-02 13:01:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 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) [2023-12-02 13:01:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2023-12-02 13:01:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 13:01:08,281 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:08,281 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 13:01:08,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:01:08,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:08,482 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:08,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash -159255839, now seen corresponding path program 1 times [2023-12-02 13:01:08,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:08,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646475045] [2023-12-02 13:01:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:08,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:08,489 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:08,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545385860] [2023-12-02 13:01:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:08,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:08,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:08,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:01:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:08,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:01:08,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:01:08,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:01:08,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646475045] [2023-12-02 13:01:08,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545385860] [2023-12-02 13:01:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545385860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:01:08,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:01:08,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:01:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010651911] [2023-12-02 13:01:08,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:01:08,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:01:08,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:01:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:01:08,558 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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) [2023-12-02 13:01:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:08,693 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2023-12-02 13:01:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:01:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 33 [2023-12-02 13:01:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:08,694 INFO L225 Difference]: With dead ends: 130 [2023-12-02 13:01:08,694 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 13:01:08,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:01:08,695 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:08,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 13:01:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-12-02 13:01:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.233644859813084) internal successors, (132), 116 states have internal predecessors, (132), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 13:01:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2023-12-02 13:01:08,714 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 33 [2023-12-02 13:01:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:08,714 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2023-12-02 13:01:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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) [2023-12-02 13:01:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2023-12-02 13:01:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 13:01:08,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:08,715 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 13:01:08,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:01:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:08,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:08,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1951137707, now seen corresponding path program 1 times [2023-12-02 13:01:08,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:08,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377300307] [2023-12-02 13:01:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:08,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:08,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131687453] [2023-12-02 13:01:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:08,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:08,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:01:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:08,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:01:08,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:01:09,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:01:09,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377300307] [2023-12-02 13:01:09,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131687453] [2023-12-02 13:01:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131687453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1926479488] [2023-12-02 13:01:09,159 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:09,159 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:09,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:09,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:09,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:09,819 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:01:09,828 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:09,846 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:11,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4519#(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|)) (<= (* |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 [2023-12-02 13:01:11,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:11,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:11,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-02 13:01:11,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846134150] [2023-12-02 13:01:11,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:11,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:01:11,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:01:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:01:11,493 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 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) [2023-12-02 13:01:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:11,829 INFO L93 Difference]: Finished difference Result 171 states and 196 transitions. [2023-12-02 13:01:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:01:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 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 33 [2023-12-02 13:01:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:11,831 INFO L225 Difference]: With dead ends: 171 [2023-12-02 13:01:11,831 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 13:01:11,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:01:11,832 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:11,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 46 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:01:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 13:01:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-12-02 13:01:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 115 states have internal predecessors, (130), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 13:01:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2023-12-02 13:01:11,843 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 33 [2023-12-02 13:01:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2023-12-02 13:01:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 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) [2023-12-02 13:01:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2023-12-02 13:01:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 13:01:11,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:11,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:11,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:01:12,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:12,045 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:12,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1479578058, now seen corresponding path program 1 times [2023-12-02 13:01:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:12,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139909414] [2023-12-02 13:01:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:12,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:12,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:12,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850096858] [2023-12-02 13:01:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:12,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:12,053 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:12,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:01:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:12,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:01:12,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:01:12,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:01:12,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:12,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139909414] [2023-12-02 13:01:12,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:12,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850096858] [2023-12-02 13:01:12,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850096858] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030335800] [2023-12-02 13:01:12,152 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:12,152 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:12,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:12,153 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:12,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:12,905 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:01:12,910 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:12,929 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:13,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5126#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:01:13,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:13,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:13,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 13:01:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545979220] [2023-12-02 13:01:13,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:01:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:01:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 13:01:13,776 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:01:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:13,856 INFO L93 Difference]: Finished difference Result 318 states and 372 transitions. [2023-12-02 13:01:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:01:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2023-12-02 13:01:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:13,858 INFO L225 Difference]: With dead ends: 318 [2023-12-02 13:01:13,858 INFO L226 Difference]: Without dead ends: 316 [2023-12-02 13:01:13,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 13:01:13,860 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:13,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 91 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-02 13:01:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2023-12-02 13:01:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 235 states have (on average 1.2042553191489362) internal successors, (283), 242 states have internal predecessors, (283), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 13:01:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 317 transitions. [2023-12-02 13:01:13,880 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 317 transitions. Word has length 39 [2023-12-02 13:01:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:13,880 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 317 transitions. [2023-12-02 13:01:13,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:01:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 317 transitions. [2023-12-02 13:01:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 13:01:13,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:13,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:13,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:01:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 13:01:14,081 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:14,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 287486975, now seen corresponding path program 1 times [2023-12-02 13:01:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322171749] [2023-12-02 13:01:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:14,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213282160] [2023-12-02 13:01:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:14,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:14,090 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:01:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:14,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:01:14,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:01:14,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:01:14,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322171749] [2023-12-02 13:01:14,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213282160] [2023-12-02 13:01:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213282160] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:01:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:01:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:01:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562681960] [2023-12-02 13:01:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:01:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:01:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:01:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:01:14,153 INFO L87 Difference]: Start difference. First operand 263 states and 317 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-12-02 13:01:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:14,193 INFO L93 Difference]: Finished difference Result 263 states and 317 transitions. [2023-12-02 13:01:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:01:14,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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 44 [2023-12-02 13:01:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:14,195 INFO L225 Difference]: With dead ends: 263 [2023-12-02 13:01:14,195 INFO L226 Difference]: Without dead ends: 261 [2023-12-02 13:01:14,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:01:14,196 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 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 [2023-12-02 13:01:14,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:01:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-02 13:01:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2023-12-02 13:01:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 231 states have (on average 1.1645021645021645) internal successors, (269), 236 states have internal predecessors, (269), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 13:01:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 303 transitions. [2023-12-02 13:01:14,217 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 303 transitions. Word has length 44 [2023-12-02 13:01:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:14,217 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 303 transitions. [2023-12-02 13:01:14,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-12-02 13:01:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 303 transitions. [2023-12-02 13:01:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 13:01:14,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:14,218 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 13:01:14,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 13:01:14,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:01:14,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:14,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:14,419 INFO L85 PathProgramCache]: Analyzing trace with hash -640162343, now seen corresponding path program 2 times [2023-12-02 13:01:14,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:14,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734272048] [2023-12-02 13:01:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:14,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:14,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:14,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411474105] [2023-12-02 13:01:14,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:14,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:14,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:14,426 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:14,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 13:01:14,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:01:14,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:14,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:01:14,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:01:14,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:14,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734272048] [2023-12-02 13:01:14,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411474105] [2023-12-02 13:01:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411474105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:01:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515732652] [2023-12-02 13:01:14,927 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:14,927 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:14,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:14,927 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:14,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:15,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:01:15,727 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:15,746 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:17,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6699#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 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 [2023-12-02 13:01:17,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:17,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:01:17,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 13:01:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003859690] [2023-12-02 13:01:17,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:17,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:01:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:01:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:01:17,903 INFO L87 Difference]: Start difference. First operand 257 states and 303 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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) [2023-12-02 13:01:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:18,059 INFO L93 Difference]: Finished difference Result 520 states and 623 transitions. [2023-12-02 13:01:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:01:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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 47 [2023-12-02 13:01:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:18,061 INFO L225 Difference]: With dead ends: 520 [2023-12-02 13:01:18,061 INFO L226 Difference]: Without dead ends: 362 [2023-12-02 13:01:18,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:01:18,063 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:18,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-12-02 13:01:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 289. [2023-12-02 13:01:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 261 states have (on average 1.1494252873563218) internal successors, (300), 266 states have internal predecessors, (300), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 13:01:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 338 transitions. [2023-12-02 13:01:18,088 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 338 transitions. Word has length 47 [2023-12-02 13:01:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:18,089 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 338 transitions. [2023-12-02 13:01:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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) [2023-12-02 13:01:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 338 transitions. [2023-12-02 13:01:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 13:01:18,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:18,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:18,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 13:01:18,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:01:18,290 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:18,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash 622787723, now seen corresponding path program 3 times [2023-12-02 13:01:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344343187] [2023-12-02 13:01:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:18,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785439269] [2023-12-02 13:01:18,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:01:18,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:18,299 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:18,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 13:01:18,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:01:18,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:18,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:01:18,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 13:01:18,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:18,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344343187] [2023-12-02 13:01:18,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785439269] [2023-12-02 13:01:18,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785439269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:01:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989913193] [2023-12-02 13:01:18,840 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:18,840 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:18,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:18,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:18,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:19,500 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:01:19,509 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:19,527 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:21,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7873#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 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 [2023-12-02 13:01:21,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:21,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:01:21,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 13:01:21,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188759036] [2023-12-02 13:01:21,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:01:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:01:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-12-02 13:01:21,836 INFO L87 Difference]: Start difference. First operand 289 states and 338 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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) [2023-12-02 13:01:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:21,928 INFO L93 Difference]: Finished difference Result 472 states and 557 transitions. [2023-12-02 13:01:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:01:21,929 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), 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 65 [2023-12-02 13:01:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:21,931 INFO L225 Difference]: With dead ends: 472 [2023-12-02 13:01:21,931 INFO L226 Difference]: Without dead ends: 314 [2023-12-02 13:01:21,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:01:21,932 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:21,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:01:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-02 13:01:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2023-12-02 13:01:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 283 states have internal predecessors, (317), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 13:01:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2023-12-02 13:01:21,955 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 65 [2023-12-02 13:01:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:21,955 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2023-12-02 13:01:21,955 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), 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) [2023-12-02 13:01:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2023-12-02 13:01:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 13:01:21,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:21,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-12-02 13:01:21,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 13:01:22,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:01:22,157 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:22,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:22,157 INFO L85 PathProgramCache]: Analyzing trace with hash 73988729, now seen corresponding path program 1 times [2023-12-02 13:01:22,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:22,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469864841] [2023-12-02 13:01:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:22,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:22,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:22,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261285823] [2023-12-02 13:01:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:22,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:22,170 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 13:01:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:22,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:01:22,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:01:22,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:01:22,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469864841] [2023-12-02 13:01:22,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261285823] [2023-12-02 13:01:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261285823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:22,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808801772] [2023-12-02 13:01:22,464 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:01:22,464 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:22,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:22,465 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:22,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:23,461 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:01:23,480 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:23,512 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:25,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9185#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= (* |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) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:01:25,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:25,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:25,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 13:01:25,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525339846] [2023-12-02 13:01:25,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:25,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:01:25,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:01:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 13:01:25,710 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:01:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:26,315 INFO L93 Difference]: Finished difference Result 772 states and 881 transitions. [2023-12-02 13:01:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 13:01:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2023-12-02 13:01:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:26,318 INFO L225 Difference]: With dead ends: 772 [2023-12-02 13:01:26,318 INFO L226 Difference]: Without dead ends: 754 [2023-12-02 13:01:26,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 13:01:26,320 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:26,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 83 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:01:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-12-02 13:01:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 581. [2023-12-02 13:01:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 539 states have (on average 1.103896103896104) internal successors, (595), 543 states have internal predecessors, (595), 34 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 13:01:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 663 transitions. [2023-12-02 13:01:26,385 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 663 transitions. Word has length 67 [2023-12-02 13:01:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:26,386 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 663 transitions. [2023-12-02 13:01:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:01:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 663 transitions. [2023-12-02 13:01:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 13:01:26,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:26,387 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:26,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 13:01:26,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:01:26,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:26,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1602109679, now seen corresponding path program 1 times [2023-12-02 13:01:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:26,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674044236] [2023-12-02 13:01:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:26,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:26,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796375366] [2023-12-02 13:01:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:26,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:26,603 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:26,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 13:01:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:26,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:01:26,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 13:01:26,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 13:01:26,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674044236] [2023-12-02 13:01:26,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796375366] [2023-12-02 13:01:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796375366] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795476418] [2023-12-02 13:01:26,796 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:26,796 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:26,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:26,797 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:26,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:27,431 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:01:27,445 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:27,463 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:29,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11230#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 13:01:29,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:29,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:29,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 13:01:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300319625] [2023-12-02 13:01:29,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:01:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:01:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 13:01:29,016 INFO L87 Difference]: Start difference. First operand 581 states and 663 transitions. Second operand has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:01:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:29,618 INFO L93 Difference]: Finished difference Result 1177 states and 1386 transitions. [2023-12-02 13:01:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:01:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 78 [2023-12-02 13:01:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:29,625 INFO L225 Difference]: With dead ends: 1177 [2023-12-02 13:01:29,625 INFO L226 Difference]: Without dead ends: 1176 [2023-12-02 13:01:29,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 13:01:29,627 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:29,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 149 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:01:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-12-02 13:01:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2023-12-02 13:01:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1058 states have (on average 1.1550094517958411) internal successors, (1222), 1062 states have internal predecessors, (1222), 69 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-02 13:01:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1360 transitions. [2023-12-02 13:01:29,762 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1360 transitions. Word has length 78 [2023-12-02 13:01:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:29,762 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1360 transitions. [2023-12-02 13:01:29,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:01:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1360 transitions. [2023-12-02 13:01:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 13:01:29,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:29,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:29,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 13:01:29,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:29,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:29,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash 615063849, now seen corresponding path program 1 times [2023-12-02 13:01:29,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:29,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609982487] [2023-12-02 13:01:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:29,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:29,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32661496] [2023-12-02 13:01:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:29,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:29,975 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:29,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 13:01:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:30,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:01:30,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 13:01:30,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 13:01:30,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:30,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609982487] [2023-12-02 13:01:30,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:30,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32661496] [2023-12-02 13:01:30,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32661496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:30,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787380444] [2023-12-02 13:01:30,363 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:01:30,363 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:30,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:30,364 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:30,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:31,287 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:01:31,298 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:31,317 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:33,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14355#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:01:33,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:33,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 13:01:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267456544] [2023-12-02 13:01:33,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:33,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:01:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:01:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:01:33,633 INFO L87 Difference]: Start difference. First operand 1135 states and 1360 transitions. Second operand has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 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) [2023-12-02 13:01:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:34,883 INFO L93 Difference]: Finished difference Result 1571 states and 1876 transitions. [2023-12-02 13:01:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:01:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 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 83 [2023-12-02 13:01:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:34,892 INFO L225 Difference]: With dead ends: 1571 [2023-12-02 13:01:34,892 INFO L226 Difference]: Without dead ends: 1556 [2023-12-02 13:01:34,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=285, Invalid=1971, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 13:01:34,894 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 222 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:34,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 262 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:01:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-12-02 13:01:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1437. [2023-12-02 13:01:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1342 states have (on average 1.1013412816691506) internal successors, (1478), 1345 states have internal predecessors, (1478), 88 states have call successors, (88), 3 states have call predecessors, (88), 3 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-02 13:01:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1654 transitions. [2023-12-02 13:01:35,057 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1654 transitions. Word has length 83 [2023-12-02 13:01:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:35,058 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 1654 transitions. [2023-12-02 13:01:35,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 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) [2023-12-02 13:01:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1654 transitions. [2023-12-02 13:01:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:01:35,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:35,060 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:35,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 13:01:35,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:35,260 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:35,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash 241787266, now seen corresponding path program 2 times [2023-12-02 13:01:35,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:35,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431484455] [2023-12-02 13:01:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:35,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:35,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:35,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081995530] [2023-12-02 13:01:35,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:35,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:35,270 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:35,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 13:01:35,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 13:01:35,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:35,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:01:35,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:01:35,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:01:35,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:35,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431484455] [2023-12-02 13:01:35,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:35,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081995530] [2023-12-02 13:01:35,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081995530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:35,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966772655] [2023-12-02 13:01:35,502 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:35,502 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:35,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:35,502 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:35,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:36,179 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:01:36,186 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:36,210 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:37,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18358#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:01:37,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:37,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:37,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 13:01:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183405952] [2023-12-02 13:01:37,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:37,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:01:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:01:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 13:01:37,216 INFO L87 Difference]: Start difference. First operand 1437 states and 1654 transitions. Second operand has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:01:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:37,560 INFO L93 Difference]: Finished difference Result 2987 states and 3517 transitions. [2023-12-02 13:01:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:01:37,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2023-12-02 13:01:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:37,572 INFO L225 Difference]: With dead ends: 2987 [2023-12-02 13:01:37,572 INFO L226 Difference]: Without dead ends: 2986 [2023-12-02 13:01:37,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 245 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 13:01:37,574 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:37,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2023-12-02 13:01:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2754. [2023-12-02 13:01:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2576 states have (on average 1.1137422360248448) internal successors, (2869), 2579 states have internal predecessors, (2869), 171 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-02 13:01:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 3211 transitions. [2023-12-02 13:01:37,805 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 3211 transitions. Word has length 93 [2023-12-02 13:01:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:37,806 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 3211 transitions. [2023-12-02 13:01:37,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:01:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 3211 transitions. [2023-12-02 13:01:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 13:01:37,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:37,809 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:37,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 13:01:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:38,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:38,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2018296607, now seen corresponding path program 2 times [2023-12-02 13:01:38,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:38,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643113025] [2023-12-02 13:01:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:38,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:38,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648886131] [2023-12-02 13:01:38,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:38,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:38,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:38,022 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:38,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 13:01:38,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:01:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:38,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:01:38,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-12-02 13:01:38,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:38,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643113025] [2023-12-02 13:01:38,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648886131] [2023-12-02 13:01:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648886131] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:01:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355312538] [2023-12-02 13:01:38,411 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:01:38,411 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:38,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:38,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:38,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:39,241 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:01:39,257 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:39,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:41,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25268#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:01:41,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:41,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:01:41,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 13:01:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978644231] [2023-12-02 13:01:41,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:41,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:01:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:01:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:01:41,563 INFO L87 Difference]: Start difference. First operand 2754 states and 3211 transitions. Second operand has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:01:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:41,938 INFO L93 Difference]: Finished difference Result 4250 states and 4961 transitions. [2023-12-02 13:01:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:01:41,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 137 [2023-12-02 13:01:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:41,949 INFO L225 Difference]: With dead ends: 4250 [2023-12-02 13:01:41,950 INFO L226 Difference]: Without dead ends: 2760 [2023-12-02 13:01:41,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 247 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:01:41,953 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:41,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 124 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2023-12-02 13:01:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2570. [2023-12-02 13:01:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2403 states have (on average 1.1136079900124844) internal successors, (2676), 2406 states have internal predecessors, (2676), 160 states have call successors, (160), 3 states have call predecessors, (160), 3 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-12-02 13:01:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 2996 transitions. [2023-12-02 13:01:42,153 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 2996 transitions. Word has length 137 [2023-12-02 13:01:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:42,154 INFO L495 AbstractCegarLoop]: Abstraction has 2570 states and 2996 transitions. [2023-12-02 13:01:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:01:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 2996 transitions. [2023-12-02 13:01:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 13:01:42,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:42,157 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:42,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 13:01:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:42,358 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:42,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -40729429, now seen corresponding path program 3 times [2023-12-02 13:01:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:42,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056485335] [2023-12-02 13:01:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:42,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:42,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608484242] [2023-12-02 13:01:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:01:42,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:42,367 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:42,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 13:01:42,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:01:42,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:42,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:01:42,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 215 proven. 92 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 13:01:42,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 195 proven. 92 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 13:01:42,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:42,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056485335] [2023-12-02 13:01:42,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608484242] [2023-12-02 13:01:42,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608484242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836103529] [2023-12-02 13:01:42,650 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:01:42,650 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:42,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:42,650 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:42,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:43,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:01:43,476 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:43,497 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:45,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33809#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:01:45,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:45,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:45,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-02 13:01:45,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961155335] [2023-12-02 13:01:45,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:45,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:01:45,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:45,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:01:45,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:01:45,999 INFO L87 Difference]: Start difference. First operand 2570 states and 2996 transitions. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 13:01:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:46,477 INFO L93 Difference]: Finished difference Result 5158 states and 6039 transitions. [2023-12-02 13:01:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:01:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 137 [2023-12-02 13:01:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:46,492 INFO L225 Difference]: With dead ends: 5158 [2023-12-02 13:01:46,493 INFO L226 Difference]: Without dead ends: 3604 [2023-12-02 13:01:46,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 367 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 13:01:46,496 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 46 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:46,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 238 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:01:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2023-12-02 13:01:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 2739. [2023-12-02 13:01:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2561 states have (on average 1.1050370948848107) internal successors, (2830), 2564 states have internal predecessors, (2830), 171 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-02 13:01:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3172 transitions. [2023-12-02 13:01:46,685 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3172 transitions. Word has length 137 [2023-12-02 13:01:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:46,685 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 3172 transitions. [2023-12-02 13:01:46,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 13:01:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3172 transitions. [2023-12-02 13:01:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 13:01:46,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:46,687 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:46,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 13:01:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 13:01:46,888 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:46,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1495905817, now seen corresponding path program 2 times [2023-12-02 13:01:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:46,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094735910] [2023-12-02 13:01:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:46,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:46,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501518028] [2023-12-02 13:01:46,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:46,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:46,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:46,898 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 13:01:46,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 13:01:46,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:46,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:01:46,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 13:01:47,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 13:01:47,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:47,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094735910] [2023-12-02 13:01:47,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:47,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501518028] [2023-12-02 13:01:47,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501518028] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:47,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464350037] [2023-12-02 13:01:47,433 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:01:47,433 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:47,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:47,433 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:47,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:48,198 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:01:48,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:48,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:50,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43570#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= (* |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) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:01:50,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:50,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:50,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-02 13:01:50,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361759435] [2023-12-02 13:01:50,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:50,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:01:50,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:01:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:01:50,632 INFO L87 Difference]: Start difference. First operand 2739 states and 3172 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 13:01:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:51,022 INFO L93 Difference]: Finished difference Result 2739 states and 3172 transitions. [2023-12-02 13:01:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:01:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 139 [2023-12-02 13:01:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:51,036 INFO L225 Difference]: With dead ends: 2739 [2023-12-02 13:01:51,036 INFO L226 Difference]: Without dead ends: 2738 [2023-12-02 13:01:51,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 361 SyntacticMatches, 23 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:01:51,038 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:51,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 27 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:01:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2023-12-02 13:01:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2656. [2023-12-02 13:01:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2483 states have (on average 1.058799838904551) internal successors, (2629), 2485 states have internal predecessors, (2629), 167 states have call successors, (167), 3 states have call predecessors, (167), 3 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2023-12-02 13:01:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 2963 transitions. [2023-12-02 13:01:51,230 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 2963 transitions. Word has length 139 [2023-12-02 13:01:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:51,230 INFO L495 AbstractCegarLoop]: Abstraction has 2656 states and 2963 transitions. [2023-12-02 13:01:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 13:01:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 2963 transitions. [2023-12-02 13:01:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 13:01:51,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:51,232 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:51,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 13:01:51,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 13:01:51,432 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:51,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1033978295, now seen corresponding path program 4 times [2023-12-02 13:01:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138678278] [2023-12-02 13:01:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:51,443 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:51,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943569246] [2023-12-02 13:01:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:01:51,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:51,444 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:51,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 13:01:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:51,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:01:51,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 172 proven. 252 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 13:01:51,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 172 proven. 252 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 13:01:51,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138678278] [2023-12-02 13:01:51,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943569246] [2023-12-02 13:01:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943569246] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322588008] [2023-12-02 13:01:51,864 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:01:51,864 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:51,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:51,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:51,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:52,702 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:01:52,713 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:52,731 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:55,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50628#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:01:55,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:55,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:55,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2023-12-02 13:01:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423617738] [2023-12-02 13:01:55,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:55,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:01:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:01:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:01:55,164 INFO L87 Difference]: Start difference. First operand 2656 states and 2963 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 13:01:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:56,170 INFO L93 Difference]: Finished difference Result 7428 states and 8285 transitions. [2023-12-02 13:01:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 13:01:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 155 [2023-12-02 13:01:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:56,198 INFO L225 Difference]: With dead ends: 7428 [2023-12-02 13:01:56,198 INFO L226 Difference]: Without dead ends: 6007 [2023-12-02 13:01:56,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 414 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 13:01:56,203 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 128 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:56,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 544 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:01:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2023-12-02 13:01:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 3730. [2023-12-02 13:01:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3491 states have (on average 1.045259238040676) internal successors, (3649), 3493 states have internal predecessors, (3649), 233 states have call successors, (233), 3 states have call predecessors, (233), 3 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2023-12-02 13:01:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4115 transitions. [2023-12-02 13:01:56,523 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4115 transitions. Word has length 155 [2023-12-02 13:01:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:56,523 INFO L495 AbstractCegarLoop]: Abstraction has 3730 states and 4115 transitions. [2023-12-02 13:01:56,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 13:01:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4115 transitions. [2023-12-02 13:01:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 13:01:56,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:56,526 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:56,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 13:01:56,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:56,727 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:01:56,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash -270936779, now seen corresponding path program 2 times [2023-12-02 13:01:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:56,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394460550] [2023-12-02 13:01:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:56,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:01:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425012710] [2023-12-02 13:01:56,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:56,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:56,738 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:56,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 13:01:56,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 13:01:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:56,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:01:56,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 13:01:56,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 13:01:57,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394460550] [2023-12-02 13:01:57,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425012710] [2023-12-02 13:01:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425012710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866461824] [2023-12-02 13:01:57,210 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:01:57,210 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:01:57,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:01:57,210 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:01:57,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:01:57,810 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:01:57,819 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:01:57,837 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:01:59,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64258#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 13:01:59,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:01:59,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:01:59,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 13:01:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569292054] [2023-12-02 13:01:59,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 13:01:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 13:01:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:01:59,407 INFO L87 Difference]: Start difference. First operand 3730 states and 4115 transitions. Second operand has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:02:00,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:00,404 INFO L93 Difference]: Finished difference Result 7115 states and 7875 transitions. [2023-12-02 13:02:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:02:00,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 168 [2023-12-02 13:02:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:00,437 INFO L225 Difference]: With dead ends: 7115 [2023-12-02 13:02:00,437 INFO L226 Difference]: Without dead ends: 7114 [2023-12-02 13:02:00,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:02:00,439 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 273 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:00,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 291 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:02:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2023-12-02 13:02:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 7080. [2023-12-02 13:02:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 6631 states have (on average 1.046448499472176) internal successors, (6939), 6633 states have internal predecessors, (6939), 443 states have call successors, (443), 3 states have call predecessors, (443), 3 states have return successors, (443), 443 states have call predecessors, (443), 443 states have call successors, (443) [2023-12-02 13:02:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 7825 transitions. [2023-12-02 13:02:01,062 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 7825 transitions. Word has length 168 [2023-12-02 13:02:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:01,063 INFO L495 AbstractCegarLoop]: Abstraction has 7080 states and 7825 transitions. [2023-12-02 13:02:01,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:02:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 7825 transitions. [2023-12-02 13:02:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 13:02:01,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:01,067 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:01,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 13:02:01,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:01,268 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:01,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:01,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2083676421, now seen corresponding path program 5 times [2023-12-02 13:02:01,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:01,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180872173] [2023-12-02 13:02:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:01,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:01,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:01,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147156963] [2023-12-02 13:02:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:02:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:01,280 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:01,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 13:02:01,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 13:02:01,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:01,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:02:01,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 274 proven. 51 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-12-02 13:02:01,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:02,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:02,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180872173] [2023-12-02 13:02:02,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:02,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147156963] [2023-12-02 13:02:02,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147156963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:02:02,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691366650] [2023-12-02 13:02:02,580 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:02:02,580 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:02,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:02,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:02,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:03,360 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:02:03,371 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:03,390 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:08,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80874#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:02:08,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:08,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:02:08,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 13:02:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438870534] [2023-12-02 13:02:08,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:08,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:02:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:02:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:02:08,150 INFO L87 Difference]: Start difference. First operand 7080 states and 7825 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 13:02:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:08,898 INFO L93 Difference]: Finished difference Result 11917 states and 13168 transitions. [2023-12-02 13:02:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:02:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 173 [2023-12-02 13:02:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:08,908 INFO L225 Difference]: With dead ends: 11917 [2023-12-02 13:02:08,909 INFO L226 Difference]: Without dead ends: 6369 [2023-12-02 13:02:08,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:02:08,917 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:08,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 142 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:02:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2023-12-02 13:02:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 6111. [2023-12-02 13:02:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6111 states, 5722 states have (on average 1.0470115344285216) internal successors, (5991), 5724 states have internal predecessors, (5991), 383 states have call successors, (383), 3 states have call predecessors, (383), 3 states have return successors, (383), 383 states have call predecessors, (383), 383 states have call successors, (383) [2023-12-02 13:02:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 6757 transitions. [2023-12-02 13:02:09,379 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 6757 transitions. Word has length 173 [2023-12-02 13:02:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:09,379 INFO L495 AbstractCegarLoop]: Abstraction has 6111 states and 6757 transitions. [2023-12-02 13:02:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 13:02:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 6757 transitions. [2023-12-02 13:02:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-02 13:02:09,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:09,382 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:09,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 13:02:09,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:09,582 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:09,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1068540697, now seen corresponding path program 6 times [2023-12-02 13:02:09,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:09,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090857477] [2023-12-02 13:02:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:09,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:09,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:09,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412038670] [2023-12-02 13:02:09,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:02:09,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:09,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:09,594 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:09,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 13:02:09,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:02:09,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:09,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:02:09,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-12-02 13:02:10,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:10,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090857477] [2023-12-02 13:02:10,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412038670] [2023-12-02 13:02:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412038670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:02:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012194924] [2023-12-02 13:02:10,139 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:02:10,139 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:10,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:10,140 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:10,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:10,918 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:02:10,928 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:10,946 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:14,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '101819#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:02:14,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:14,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:02:14,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 13:02:14,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033540850] [2023-12-02 13:02:14,292 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:14,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:02:14,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:02:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:02:14,294 INFO L87 Difference]: Start difference. First operand 6111 states and 6757 transitions. Second operand has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 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) [2023-12-02 13:02:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:14,944 INFO L93 Difference]: Finished difference Result 6466 states and 7146 transitions. [2023-12-02 13:02:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:02:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 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 191 [2023-12-02 13:02:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:14,957 INFO L225 Difference]: With dead ends: 6466 [2023-12-02 13:02:14,957 INFO L226 Difference]: Without dead ends: 6465 [2023-12-02 13:02:14,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 338 SyntacticMatches, 22 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 13:02:14,960 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:14,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 266 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:02:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2023-12-02 13:02:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6175. [2023-12-02 13:02:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6175 states, 5782 states have (on average 1.0465236942234521) internal successors, (6051), 5784 states have internal predecessors, (6051), 387 states have call successors, (387), 3 states have call predecessors, (387), 3 states have return successors, (387), 387 states have call predecessors, (387), 387 states have call successors, (387) [2023-12-02 13:02:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 6825 transitions. [2023-12-02 13:02:15,426 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 6825 transitions. Word has length 191 [2023-12-02 13:02:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:15,426 INFO L495 AbstractCegarLoop]: Abstraction has 6175 states and 6825 transitions. [2023-12-02 13:02:15,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 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) [2023-12-02 13:02:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 6825 transitions. [2023-12-02 13:02:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 13:02:15,429 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:15,429 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:15,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-02 13:02:15,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 13:02:15,629 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:15,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -159477006, now seen corresponding path program 3 times [2023-12-02 13:02:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:15,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335070697] [2023-12-02 13:02:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:15,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112273836] [2023-12-02 13:02:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:02:15,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:15,641 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:15,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 13:02:15,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:02:15,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:15,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:02:15,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 830 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:02:15,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 830 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:02:16,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:16,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335070697] [2023-12-02 13:02:16,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:16,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112273836] [2023-12-02 13:02:16,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112273836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:16,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336925888] [2023-12-02 13:02:16,221 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:02:16,221 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:16,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:16,221 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:16,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:16,986 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:02:16,992 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:17,010 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:18,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117301#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:02:18,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:18,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:02:18,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 13:02:18,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992075782] [2023-12-02 13:02:18,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:18,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 13:02:18,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 13:02:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:02:18,283 INFO L87 Difference]: Start difference. First operand 6175 states and 6825 transitions. Second operand has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:02:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:19,316 INFO L93 Difference]: Finished difference Result 11392 states and 12866 transitions. [2023-12-02 13:02:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 13:02:19,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 201 [2023-12-02 13:02:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:19,339 INFO L225 Difference]: With dead ends: 11392 [2023-12-02 13:02:19,340 INFO L226 Difference]: Without dead ends: 11391 [2023-12-02 13:02:19,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 551 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:02:19,343 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 143 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:19,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 230 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:02:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2023-12-02 13:02:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 10591. [2023-12-02 13:02:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10591 states, 9922 states have (on average 1.054928441846402) internal successors, (10467), 9924 states have internal predecessors, (10467), 663 states have call successors, (663), 3 states have call predecessors, (663), 3 states have return successors, (663), 663 states have call predecessors, (663), 663 states have call successors, (663) [2023-12-02 13:02:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 11793 transitions. [2023-12-02 13:02:20,413 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 11793 transitions. Word has length 201 [2023-12-02 13:02:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:20,414 INFO L495 AbstractCegarLoop]: Abstraction has 10591 states and 11793 transitions. [2023-12-02 13:02:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:02:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 11793 transitions. [2023-12-02 13:02:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-02 13:02:20,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:20,417 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:20,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 13:02:20,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 13:02:20,618 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:20,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash -628357887, now seen corresponding path program 7 times [2023-12-02 13:02:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:20,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611982393] [2023-12-02 13:02:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:20,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:20,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738104285] [2023-12-02 13:02:20,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:02:20,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:20,633 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 13:02:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:02:20,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:02:20,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 257 proven. 584 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:02:21,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 257 proven. 584 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:02:21,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611982393] [2023-12-02 13:02:21,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738104285] [2023-12-02 13:02:21,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738104285] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560104963] [2023-12-02 13:02:21,260 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:02:21,261 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:21,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:21,261 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:21,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:22,090 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:02:22,105 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:22,134 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:25,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143228#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:02:25,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:25,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:02:25,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2023-12-02 13:02:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977948609] [2023-12-02 13:02:25,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:25,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 13:02:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 13:02:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 13:02:25,800 INFO L87 Difference]: Start difference. First operand 10591 states and 11793 transitions. Second operand has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 13:02:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:27,423 INFO L93 Difference]: Finished difference Result 24199 states and 26980 transitions. [2023-12-02 13:02:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:02:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 209 [2023-12-02 13:02:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:27,445 INFO L225 Difference]: With dead ends: 24199 [2023-12-02 13:02:27,445 INFO L226 Difference]: Without dead ends: 17579 [2023-12-02 13:02:27,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 554 SyntacticMatches, 31 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 13:02:27,454 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 51 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:27,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 476 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:02:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17579 states. [2023-12-02 13:02:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17579 to 12120. [2023-12-02 13:02:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12120 states, 11356 states have (on average 1.0494011976047903) internal successors, (11917), 11358 states have internal predecessors, (11917), 758 states have call successors, (758), 3 states have call predecessors, (758), 3 states have return successors, (758), 758 states have call predecessors, (758), 758 states have call successors, (758) [2023-12-02 13:02:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12120 states to 12120 states and 13433 transitions. [2023-12-02 13:02:28,569 INFO L78 Accepts]: Start accepts. Automaton has 12120 states and 13433 transitions. Word has length 209 [2023-12-02 13:02:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:28,570 INFO L495 AbstractCegarLoop]: Abstraction has 12120 states and 13433 transitions. [2023-12-02 13:02:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 13:02:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 12120 states and 13433 transitions. [2023-12-02 13:02:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 13:02:28,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:28,573 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:28,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 13:02:28,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:28,774 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:28,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash -522076567, now seen corresponding path program 8 times [2023-12-02 13:02:28,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:28,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721128838] [2023-12-02 13:02:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:28,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066094284] [2023-12-02 13:02:28,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:02:28,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:28,790 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:28,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 13:02:28,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 13:02:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:28,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 13:02:28,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 0 proven. 792 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-12-02 13:02:29,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:29,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721128838] [2023-12-02 13:02:29,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066094284] [2023-12-02 13:02:29,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066094284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:02:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076482903] [2023-12-02 13:02:29,737 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:02:29,737 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:29,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:29,737 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:29,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:30,498 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:02:30,508 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:30,526 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:34,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184867#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:02:34,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:02:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 13:02:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612692881] [2023-12-02 13:02:34,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:34,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:02:34,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:02:34,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:02:34,125 INFO L87 Difference]: Start difference. First operand 12120 states and 13433 transitions. Second operand has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 13:02:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:35,701 INFO L93 Difference]: Finished difference Result 19111 states and 21216 transitions. [2023-12-02 13:02:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 13:02:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 227 [2023-12-02 13:02:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:35,714 INFO L225 Difference]: With dead ends: 19111 [2023-12-02 13:02:35,715 INFO L226 Difference]: Without dead ends: 12594 [2023-12-02 13:02:35,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 403 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 13:02:35,723 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:35,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 438 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:02:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2023-12-02 13:02:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 12216. [2023-12-02 13:02:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 11446 states have (on average 1.0490127555477897) internal successors, (12007), 11448 states have internal predecessors, (12007), 764 states have call successors, (764), 3 states have call predecessors, (764), 3 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2023-12-02 13:02:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 13535 transitions. [2023-12-02 13:02:36,754 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 13535 transitions. Word has length 227 [2023-12-02 13:02:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:36,755 INFO L495 AbstractCegarLoop]: Abstraction has 12216 states and 13535 transitions. [2023-12-02 13:02:36,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 13:02:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 13535 transitions. [2023-12-02 13:02:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 13:02:36,759 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:36,759 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:36,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-02 13:02:36,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 13:02:36,965 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:36,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 564193587, now seen corresponding path program 9 times [2023-12-02 13:02:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:36,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658184470] [2023-12-02 13:02:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:36,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:36,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600284182] [2023-12-02 13:02:36,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:02:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:36,977 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:36,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 13:02:37,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:02:37,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:37,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 13:02:37,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-12-02 13:02:37,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-12-02 13:02:38,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658184470] [2023-12-02 13:02:38,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600284182] [2023-12-02 13:02:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600284182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945763668] [2023-12-02 13:02:38,060 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:02:38,061 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:38,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:38,061 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:38,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:38,812 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:02:38,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:38,867 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:42,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221547#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:02:42,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:42,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:02:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-12-02 13:02:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830853680] [2023-12-02 13:02:42,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:42,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:02:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:02:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:02:42,627 INFO L87 Difference]: Start difference. First operand 12216 states and 13535 transitions. Second operand has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 13:02:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:47,679 INFO L93 Difference]: Finished difference Result 15653 states and 17344 transitions. [2023-12-02 13:02:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 13:02:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 227 [2023-12-02 13:02:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:47,692 INFO L225 Difference]: With dead ends: 15653 [2023-12-02 13:02:47,693 INFO L226 Difference]: Without dead ends: 15652 [2023-12-02 13:02:47,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 613 SyntacticMatches, 27 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 13:02:47,697 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 366 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:47,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 520 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:02:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2023-12-02 13:02:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 15350. [2023-12-02 13:02:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15350 states, 14385 states have (on average 1.0480361487660759) internal successors, (15076), 14387 states have internal predecessors, (15076), 959 states have call successors, (959), 3 states have call predecessors, (959), 3 states have return successors, (959), 959 states have call predecessors, (959), 959 states have call successors, (959) [2023-12-02 13:02:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15350 states to 15350 states and 16994 transitions. [2023-12-02 13:02:49,050 INFO L78 Accepts]: Start accepts. Automaton has 15350 states and 16994 transitions. Word has length 227 [2023-12-02 13:02:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:49,051 INFO L495 AbstractCegarLoop]: Abstraction has 15350 states and 16994 transitions. [2023-12-02 13:02:49,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 13:02:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 15350 states and 16994 transitions. [2023-12-02 13:02:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 13:02:49,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:49,054 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:49,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 13:02:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:49,255 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:02:49,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2077693551, now seen corresponding path program 10 times [2023-12-02 13:02:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:02:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014533442] [2023-12-02 13:02:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:02:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:02:49,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:02:49,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677838046] [2023-12-02 13:02:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:02:49,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:49,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:49,265 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:49,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 13:02:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:02:49,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:02:49,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-12-02 13:02:49,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-12-02 13:02:50,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:02:50,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014533442] [2023-12-02 13:02:50,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677838046] [2023-12-02 13:02:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677838046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771783944] [2023-12-02 13:02:50,910 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:02:50,910 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:50,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:50,910 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:50,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:02:51,721 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:02:51,731 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:02:51,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:02:55,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257894#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:02:55,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:02:55,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:02:55,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 13:02:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709211422] [2023-12-02 13:02:55,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 13:02:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:02:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 13:02:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 13:02:55,517 INFO L87 Difference]: Start difference. First operand 15350 states and 16994 transitions. Second operand has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 13:02:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:58,613 INFO L93 Difference]: Finished difference Result 19489 states and 21559 transitions. [2023-12-02 13:02:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 13:02:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 227 [2023-12-02 13:02:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:58,635 INFO L225 Difference]: With dead ends: 19489 [2023-12-02 13:02:58,636 INFO L226 Difference]: Without dead ends: 19488 [2023-12-02 13:02:58,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 626 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 13:02:58,643 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 226 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:58,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 737 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:02:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19488 states. [2023-12-02 13:03:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19488 to 19310. [2023-12-02 13:03:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19310 states, 18097 states have (on average 1.0463612753495055) internal successors, (18936), 18099 states have internal predecessors, (18936), 1207 states have call successors, (1207), 3 states have call predecessors, (1207), 3 states have return successors, (1207), 1207 states have call predecessors, (1207), 1207 states have call successors, (1207) [2023-12-02 13:03:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19310 states to 19310 states and 21350 transitions. [2023-12-02 13:03:00,249 INFO L78 Accepts]: Start accepts. Automaton has 19310 states and 21350 transitions. Word has length 227 [2023-12-02 13:03:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:00,249 INFO L495 AbstractCegarLoop]: Abstraction has 19310 states and 21350 transitions. [2023-12-02 13:03:00,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 13:03:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 19310 states and 21350 transitions. [2023-12-02 13:03:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-12-02 13:03:00,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:00,255 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:03:00,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 13:03:00,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 13:03:00,456 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:03:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -473130103, now seen corresponding path program 11 times [2023-12-02 13:03:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553438728] [2023-12-02 13:03:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:00,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:03:00,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117459388] [2023-12-02 13:03:00,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:03:00,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:00,469 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:00,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 13:03:00,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 13:03:00,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:03:00,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 13:03:00,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-12-02 13:03:00,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:01,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553438728] [2023-12-02 13:03:01,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:03:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117459388] [2023-12-02 13:03:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117459388] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:03:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744577870] [2023-12-02 13:03:01,087 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:03:01,087 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:01,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:01,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:01,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:03:02,023 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:03:02,037 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:03:02,067 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:03:05,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302576#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:03:05,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:03:05,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:03:05,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 13:03:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271331725] [2023-12-02 13:03:05,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:03:05,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:03:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:03:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:03:05,092 INFO L87 Difference]: Start difference. First operand 19310 states and 21350 transitions. Second operand has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:03:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:07,388 INFO L93 Difference]: Finished difference Result 27036 states and 29948 transitions. [2023-12-02 13:03:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 13:03:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 299 [2023-12-02 13:03:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:07,405 INFO L225 Difference]: With dead ends: 27036 [2023-12-02 13:03:07,405 INFO L226 Difference]: Without dead ends: 20535 [2023-12-02 13:03:07,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 557 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 13:03:07,414 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 207 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:07,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 693 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:03:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20535 states. [2023-12-02 13:03:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20535 to 19330. [2023-12-02 13:03:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19330 states, 18116 states have (on average 1.0463126517995143) internal successors, (18955), 18118 states have internal predecessors, (18955), 1208 states have call successors, (1208), 3 states have call predecessors, (1208), 3 states have return successors, (1208), 1208 states have call predecessors, (1208), 1208 states have call successors, (1208) [2023-12-02 13:03:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19330 states to 19330 states and 21371 transitions. [2023-12-02 13:03:08,938 INFO L78 Accepts]: Start accepts. Automaton has 19330 states and 21371 transitions. Word has length 299 [2023-12-02 13:03:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:08,938 INFO L495 AbstractCegarLoop]: Abstraction has 19330 states and 21371 transitions. [2023-12-02 13:03:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:03:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19330 states and 21371 transitions. [2023-12-02 13:03:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-12-02 13:03:08,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:08,947 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:03:08,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 13:03:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 13:03:09,147 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:03:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 837599985, now seen corresponding path program 12 times [2023-12-02 13:03:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441989467] [2023-12-02 13:03:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:09,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:03:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673515921] [2023-12-02 13:03:09,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:03:09,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:09,163 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:09,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 13:03:09,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:03:09,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:03:09,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 13:03:09,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 599 proven. 1508 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 13:03:09,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 599 proven. 1508 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 13:03:10,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441989467] [2023-12-02 13:03:10,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:03:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673515921] [2023-12-02 13:03:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673515921] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:03:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519968394] [2023-12-02 13:03:10,103 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:03:10,103 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:10,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:10,103 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:10,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:03:10,898 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:03:10,912 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:03:10,930 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:03:14,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '356732#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:03:14,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:03:14,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:03:14,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2023-12-02 13:03:14,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263277192] [2023-12-02 13:03:14,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:03:14,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 13:03:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 13:03:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 13:03:14,406 INFO L87 Difference]: Start difference. First operand 19330 states and 21371 transitions. Second operand has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-12-02 13:03:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:17,552 INFO L93 Difference]: Finished difference Result 42369 states and 46981 transitions. [2023-12-02 13:03:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:03:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 317 [2023-12-02 13:03:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:17,582 INFO L225 Difference]: With dead ends: 42369 [2023-12-02 13:03:17,582 INFO L226 Difference]: Without dead ends: 31324 [2023-12-02 13:03:17,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 873 SyntacticMatches, 27 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 13:03:17,596 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 60 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:17,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 974 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:03:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31324 states. [2023-12-02 13:03:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31324 to 23435. [2023-12-02 13:03:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23435 states, 21965 states have (on average 1.038652401547917) internal successors, (22814), 21967 states have internal predecessors, (22814), 1464 states have call successors, (1464), 3 states have call predecessors, (1464), 3 states have return successors, (1464), 1464 states have call predecessors, (1464), 1464 states have call successors, (1464) [2023-12-02 13:03:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23435 states to 23435 states and 25742 transitions. [2023-12-02 13:03:19,529 INFO L78 Accepts]: Start accepts. Automaton has 23435 states and 25742 transitions. Word has length 317 [2023-12-02 13:03:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 23435 states and 25742 transitions. [2023-12-02 13:03:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-12-02 13:03:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23435 states and 25742 transitions. [2023-12-02 13:03:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-12-02 13:03:19,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:19,537 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:03:19,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 13:03:19,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 13:03:19,738 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:03:19,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1171726247, now seen corresponding path program 13 times [2023-12-02 13:03:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:19,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113955282] [2023-12-02 13:03:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:19,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:03:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626673936] [2023-12-02 13:03:19,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:03:19,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:19,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:19,752 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:19,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 13:03:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:03:19,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 13:03:19,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-02 13:03:20,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-02 13:03:21,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113955282] [2023-12-02 13:03:21,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:03:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626673936] [2023-12-02 13:03:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626673936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:03:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095180357] [2023-12-02 13:03:21,259 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:03:21,259 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:21,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:21,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:21,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:03:22,056 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:03:22,067 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:03:22,085 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:03:26,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '432838#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:03:26,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:03:26,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:03:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 13:03:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796419657] [2023-12-02 13:03:26,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:03:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 13:03:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 13:03:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 13:03:26,270 INFO L87 Difference]: Start difference. First operand 23435 states and 25742 transitions. Second operand has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 13:03:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:37,357 INFO L93 Difference]: Finished difference Result 26153 states and 28732 transitions. [2023-12-02 13:03:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 13:03:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 335 [2023-12-02 13:03:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:37,381 INFO L225 Difference]: With dead ends: 26153 [2023-12-02 13:03:37,381 INFO L226 Difference]: Without dead ends: 26152 [2023-12-02 13:03:37,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 938 SyntacticMatches, 18 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1790, Invalid=8922, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 13:03:37,386 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 716 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:37,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 972 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 13:03:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26152 states. [2023-12-02 13:03:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26152 to 25284. [2023-12-02 13:03:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25284 states, 23699 states have (on average 1.0389889868770834) internal successors, (24623), 23701 states have internal predecessors, (24623), 1579 states have call successors, (1579), 3 states have call predecessors, (1579), 3 states have return successors, (1579), 1579 states have call predecessors, (1579), 1579 states have call successors, (1579) [2023-12-02 13:03:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25284 states to 25284 states and 27781 transitions. [2023-12-02 13:03:39,472 INFO L78 Accepts]: Start accepts. Automaton has 25284 states and 27781 transitions. Word has length 335 [2023-12-02 13:03:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:39,473 INFO L495 AbstractCegarLoop]: Abstraction has 25284 states and 27781 transitions. [2023-12-02 13:03:39,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 13:03:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25284 states and 27781 transitions. [2023-12-02 13:03:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-12-02 13:03:39,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:39,481 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:03:39,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 13:03:39,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 13:03:39,681 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:03:39,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:39,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1609462975, now seen corresponding path program 3 times [2023-12-02 13:03:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:39,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255130047] [2023-12-02 13:03:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:39,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:03:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227719290] [2023-12-02 13:03:39,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:03:39,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:39,697 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:39,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 13:03:39,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:03:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:03:39,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 13:03:39,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 13:03:40,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 13:03:40,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255130047] [2023-12-02 13:03:40,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:03:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227719290] [2023-12-02 13:03:40,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227719290] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:03:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2052699803] [2023-12-02 13:03:40,919 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:03:40,920 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:40,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:40,920 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:40,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:03:41,553 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:03:41,562 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:03:41,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:03:43,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '492974#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 13:03:43,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:03:43,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:03:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-12-02 13:03:43,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269303426] [2023-12-02 13:03:43,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:03:43,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 13:03:43,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:03:43,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 13:03:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 13:03:43,180 INFO L87 Difference]: Start difference. First operand 25284 states and 27781 transitions. Second operand has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-12-02 13:03:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:03:47,100 INFO L93 Difference]: Finished difference Result 39099 states and 43041 transitions. [2023-12-02 13:03:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 13:03:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 348 [2023-12-02 13:03:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:03:47,135 INFO L225 Difference]: With dead ends: 39099 [2023-12-02 13:03:47,135 INFO L226 Difference]: Without dead ends: 39098 [2023-12-02 13:03:47,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 985 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 13:03:47,141 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 833 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:03:47,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 526 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:03:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39098 states. [2023-12-02 13:03:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39098 to 39024. [2023-12-02 13:03:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39024 states, 36579 states have (on average 1.0400229639957352) internal successors, (38043), 36581 states have internal predecessors, (38043), 2439 states have call successors, (2439), 3 states have call predecessors, (2439), 3 states have return successors, (2439), 2439 states have call predecessors, (2439), 2439 states have call successors, (2439) [2023-12-02 13:03:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39024 states to 39024 states and 42921 transitions. [2023-12-02 13:03:50,394 INFO L78 Accepts]: Start accepts. Automaton has 39024 states and 42921 transitions. Word has length 348 [2023-12-02 13:03:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:03:50,395 INFO L495 AbstractCegarLoop]: Abstraction has 39024 states and 42921 transitions. [2023-12-02 13:03:50,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-12-02 13:03:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 39024 states and 42921 transitions. [2023-12-02 13:03:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 13:03:50,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:03:50,404 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:03:50,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 13:03:50,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 13:03:50,604 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:03:50,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:03:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1817617091, now seen corresponding path program 14 times [2023-12-02 13:03:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:03:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246453027] [2023-12-02 13:03:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:03:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:03:50,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:03:50,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066290554] [2023-12-02 13:03:50,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:03:50,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:03:50,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:03:50,619 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:03:50,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 13:03:50,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 13:03:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:03:50,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 13:03:50,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:03:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 1222 proven. 187 refuted. 0 times theorem prover too weak. 1817 trivial. 0 not checked. [2023-12-02 13:03:59,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:03:59,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:03:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246453027] [2023-12-02 13:03:59,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:03:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066290554] [2023-12-02 13:03:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066290554] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:03:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828940117] [2023-12-02 13:03:59,664 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:03:59,664 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:03:59,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:03:59,664 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:03:59,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:04:00,419 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:04:00,430 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:04:00,448 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:04:09,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '582065#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:04:09,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:04:09,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:09,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-02 13:04:09,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756637548] [2023-12-02 13:04:09,451 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:04:09,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:04:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:04:09,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2051, Unknown=6, NotChecked=0, Total=2256 [2023-12-02 13:04:09,453 INFO L87 Difference]: Start difference. First operand 39024 states and 42921 transitions. Second operand has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:04:12,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:04:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:22,820 INFO L93 Difference]: Finished difference Result 65505 states and 72124 transitions. [2023-12-02 13:04:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 13:04:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 371 [2023-12-02 13:04:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:22,852 INFO L225 Difference]: With dead ends: 65505 [2023-12-02 13:04:22,852 INFO L226 Difference]: Without dead ends: 35601 [2023-12-02 13:04:22,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 663 SyntacticMatches, 44 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=451, Invalid=4799, Unknown=6, NotChecked=0, Total=5256 [2023-12-02 13:04:22,871 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:22,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 171 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2152 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2023-12-02 13:04:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35601 states. [2023-12-02 13:04:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35601 to 34768. [2023-12-02 13:04:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34768 states, 32588 states have (on average 1.0421013870136246) internal successors, (33960), 32590 states have internal predecessors, (33960), 2174 states have call successors, (2174), 3 states have call predecessors, (2174), 3 states have return successors, (2174), 2174 states have call predecessors, (2174), 2174 states have call successors, (2174) [2023-12-02 13:04:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34768 states to 34768 states and 38308 transitions. [2023-12-02 13:04:25,808 INFO L78 Accepts]: Start accepts. Automaton has 34768 states and 38308 transitions. Word has length 371 [2023-12-02 13:04:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:25,808 INFO L495 AbstractCegarLoop]: Abstraction has 34768 states and 38308 transitions. [2023-12-02 13:04:25,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:04:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34768 states and 38308 transitions. [2023-12-02 13:04:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-12-02 13:04:25,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:25,818 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:25,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 13:04:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 13:04:26,019 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:04:26,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:26,019 INFO L85 PathProgramCache]: Analyzing trace with hash -179749422, now seen corresponding path program 4 times [2023-12-02 13:04:26,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:26,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337503001] [2023-12-02 13:04:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:26,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:26,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:04:26,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680098048] [2023-12-02 13:04:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:04:26,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:26,034 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:26,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 13:04:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:26,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:04:26,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 3938 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 13:04:26,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:04:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 3938 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 13:04:27,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:27,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337503001] [2023-12-02 13:04:27,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:04:27,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680098048] [2023-12-02 13:04:27,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680098048] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:04:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598212158] [2023-12-02 13:04:27,516 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:04:27,516 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:04:27,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:04:27,517 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:04:27,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:04:28,182 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:04:28,187 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:04:28,206 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:04:30,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '697518#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:04:30,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:04:30,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:04:30,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 13:04:30,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700709829] [2023-12-02 13:04:30,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:04:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 13:04:30,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 13:04:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 13:04:30,130 INFO L87 Difference]: Start difference. First operand 34768 states and 38308 transitions. Second operand has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 13:04:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:36,123 INFO L93 Difference]: Finished difference Result 63974 states and 72051 transitions. [2023-12-02 13:04:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 13:04:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) Word has length 417 [2023-12-02 13:04:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:36,182 INFO L225 Difference]: With dead ends: 63974 [2023-12-02 13:04:36,182 INFO L226 Difference]: Without dead ends: 63973 [2023-12-02 13:04:36,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1163 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 13:04:36,191 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 452 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:36,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 423 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:04:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63973 states. [2023-12-02 13:04:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63973 to 58960. [2023-12-02 13:04:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58960 states, 55268 states have (on average 1.052182094521242) internal successors, (58152), 55270 states have internal predecessors, (58152), 3686 states have call successors, (3686), 3 states have call predecessors, (3686), 3 states have return successors, (3686), 3686 states have call predecessors, (3686), 3686 states have call successors, (3686) [2023-12-02 13:04:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58960 states to 58960 states and 65524 transitions. [2023-12-02 13:04:41,956 INFO L78 Accepts]: Start accepts. Automaton has 58960 states and 65524 transitions. Word has length 417 [2023-12-02 13:04:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:41,956 INFO L495 AbstractCegarLoop]: Abstraction has 58960 states and 65524 transitions. [2023-12-02 13:04:41,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 13:04:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 58960 states and 65524 transitions. [2023-12-02 13:04:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-02 13:04:41,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:41,968 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:41,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 13:04:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 13:04:42,169 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:04:42,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1400905251, now seen corresponding path program 15 times [2023-12-02 13:04:42,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:42,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867087550] [2023-12-02 13:04:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:42,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:04:42,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506638561] [2023-12-02 13:04:42,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:04:42,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:42,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:42,192 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:42,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 13:04:42,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:04:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:04:42,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 13:04:42,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4722 backedges. 0 proven. 3508 refuted. 0 times theorem prover too weak. 1214 trivial. 0 not checked. [2023-12-02 13:04:43,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:04:43,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:04:43,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867087550] [2023-12-02 13:04:43,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:04:43,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506638561] [2023-12-02 13:04:43,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506638561] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:04:43,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872310164] [2023-12-02 13:04:43,365 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:04:43,365 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:04:43,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:04:43,366 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:04:43,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:04:44,193 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:04:44,203 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:04:44,221 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:04:48,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '836620#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:04:48,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:04:48,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:04:48,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 13:04:48,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947780170] [2023-12-02 13:04:48,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:04:48,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:04:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:04:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:04:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:04:48,267 INFO L87 Difference]: Start difference. First operand 58960 states and 65524 transitions. Second operand has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 13:04:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:04:53,756 INFO L93 Difference]: Finished difference Result 61569 states and 68420 transitions. [2023-12-02 13:04:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:04:53,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 443 [2023-12-02 13:04:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:04:53,813 INFO L225 Difference]: With dead ends: 61569 [2023-12-02 13:04:53,813 INFO L226 Difference]: Without dead ends: 61568 [2023-12-02 13:04:53,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 837 SyntacticMatches, 24 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:04:53,821 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:04:53,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 360 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:04:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61568 states. [2023-12-02 13:04:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61568 to 60696. [2023-12-02 13:04:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60696 states, 56896 states have (on average 1.0521653543307086) internal successors, (59864), 56898 states have internal predecessors, (59864), 3794 states have call successors, (3794), 3 states have call predecessors, (3794), 3 states have return successors, (3794), 3794 states have call predecessors, (3794), 3794 states have call successors, (3794) [2023-12-02 13:04:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60696 states to 60696 states and 67452 transitions. [2023-12-02 13:04:59,090 INFO L78 Accepts]: Start accepts. Automaton has 60696 states and 67452 transitions. Word has length 443 [2023-12-02 13:04:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:04:59,091 INFO L495 AbstractCegarLoop]: Abstraction has 60696 states and 67452 transitions. [2023-12-02 13:04:59,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 13:04:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 60696 states and 67452 transitions. [2023-12-02 13:04:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-12-02 13:04:59,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:04:59,105 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 22, 22, 22, 22, 22, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:04:59,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 13:04:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 13:04:59,305 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:04:59,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:04:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1597742163, now seen corresponding path program 16 times [2023-12-02 13:04:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:04:59,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965718242] [2023-12-02 13:04:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:04:59,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:04:59,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:04:59,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250943766] [2023-12-02 13:04:59,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:04:59,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:04:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:04:59,323 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:04:59,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 13:04:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:04:59,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:04:59,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:04:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5578 backedges. 3306 proven. 936 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-02 13:04:59,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:05:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5578 backedges. 2970 proven. 936 refuted. 0 times theorem prover too weak. 1672 trivial. 0 not checked. [2023-12-02 13:05:00,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965718242] [2023-12-02 13:05:00,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:05:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250943766] [2023-12-02 13:05:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250943766] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:05:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992497915] [2023-12-02 13:05:00,148 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:05:00,148 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:05:00,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:05:00,148 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:05:00,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:05:00,988 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:05:00,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:05:01,017 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:05:05,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '977109#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:05:05,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:05:05,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:05:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-12-02 13:05:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823699718] [2023-12-02 13:05:05,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:05:05,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 13:05:05,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 13:05:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 13:05:05,479 INFO L87 Difference]: Start difference. First operand 60696 states and 67452 transitions. Second operand has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-12-02 13:05:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:18,181 INFO L93 Difference]: Finished difference Result 182458 states and 203426 transitions. [2023-12-02 13:05:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 13:05:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 479 [2023-12-02 13:05:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:18,332 INFO L225 Difference]: With dead ends: 182458 [2023-12-02 13:05:18,332 INFO L226 Difference]: Without dead ends: 138848 [2023-12-02 13:05:18,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1356 SyntacticMatches, 33 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=513, Invalid=3519, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 13:05:18,378 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 194 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:18,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 942 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:05:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138848 states. [2023-12-02 13:05:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138848 to 71567. [2023-12-02 13:05:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71567 states, 67090 states have (on average 1.0452377403487851) internal successors, (70125), 67092 states have internal predecessors, (70125), 4471 states have call successors, (4471), 3 states have call predecessors, (4471), 3 states have return successors, (4471), 4471 states have call predecessors, (4471), 4471 states have call successors, (4471) [2023-12-02 13:05:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71567 states to 71567 states and 79067 transitions. [2023-12-02 13:05:25,345 INFO L78 Accepts]: Start accepts. Automaton has 71567 states and 79067 transitions. Word has length 479 [2023-12-02 13:05:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:25,345 INFO L495 AbstractCegarLoop]: Abstraction has 71567 states and 79067 transitions. [2023-12-02 13:05:25,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-12-02 13:05:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 71567 states and 79067 transitions. [2023-12-02 13:05:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 13:05:25,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:25,364 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 26, 26, 26, 26, 26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:25,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 13:05:25,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-12-02 13:05:25,565 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:05:25,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1910157673, now seen corresponding path program 17 times [2023-12-02 13:05:25,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:25,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129388845] [2023-12-02 13:05:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:25,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:05:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810590689] [2023-12-02 13:05:25,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:05:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:25,583 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:25,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 13:05:25,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 13:05:25,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:05:25,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:05:25,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 3260 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2023-12-02 13:05:26,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:05:26,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129388845] [2023-12-02 13:05:26,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:05:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810590689] [2023-12-02 13:05:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810590689] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:05:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593835468] [2023-12-02 13:05:26,472 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:05:26,472 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:05:26,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:05:26,472 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:05:26,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:05:27,276 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:05:27,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:05:27,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:05:32,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1264580#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:05:32,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:05:32,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:05:32,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 13:05:32,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802457711] [2023-12-02 13:05:32,744 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:05:32,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 13:05:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:32,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 13:05:32,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 13:05:32,745 INFO L87 Difference]: Start difference. First operand 71567 states and 79067 transitions. Second operand has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:05:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:05:40,495 INFO L93 Difference]: Finished difference Result 101629 states and 112598 transitions. [2023-12-02 13:05:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 13:05:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 515 [2023-12-02 13:05:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:05:40,566 INFO L225 Difference]: With dead ends: 101629 [2023-12-02 13:05:40,566 INFO L226 Difference]: Without dead ends: 73228 [2023-12-02 13:05:40,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 945 SyntacticMatches, 58 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 13:05:40,591 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 181 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:05:40,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1120 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 13:05:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73228 states. [2023-12-02 13:05:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73228 to 70960. [2023-12-02 13:05:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70960 states, 66521 states have (on average 1.0450384089234979) internal successors, (69517), 66523 states have internal predecessors, (69517), 4433 states have call successors, (4433), 3 states have call predecessors, (4433), 3 states have return successors, (4433), 4433 states have call predecessors, (4433), 4433 states have call successors, (4433) [2023-12-02 13:05:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70960 states to 70960 states and 78383 transitions. [2023-12-02 13:05:46,887 INFO L78 Accepts]: Start accepts. Automaton has 70960 states and 78383 transitions. Word has length 515 [2023-12-02 13:05:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:05:46,888 INFO L495 AbstractCegarLoop]: Abstraction has 70960 states and 78383 transitions. [2023-12-02 13:05:46,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:05:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 70960 states and 78383 transitions. [2023-12-02 13:05:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 13:05:46,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:05:46,901 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:05:46,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-02 13:05:47,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:47,101 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:05:47,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:05:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash 371994163, now seen corresponding path program 18 times [2023-12-02 13:05:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:05:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527883488] [2023-12-02 13:05:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:05:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:05:47,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:05:47,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432512507] [2023-12-02 13:05:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:05:47,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:05:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:05:47,122 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:05:47,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 13:05:47,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:05:47,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:05:47,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:05:47,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:05:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6590 backedges. 3687 proven. 1912 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-12-02 13:05:47,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:05:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6590 backedges. 3345 proven. 1912 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2023-12-02 13:05:48,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:05:48,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527883488] [2023-12-02 13:05:48,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:05:48,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432512507] [2023-12-02 13:05:48,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432512507] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:05:48,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038171127] [2023-12-02 13:05:48,336 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:05:48,337 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:05:48,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:05:48,337 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:05:48,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:05:49,094 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:05:49,104 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:05:49,123 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:05:54,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1461947#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:05:54,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:05:54,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:05:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2023-12-02 13:05:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811773784] [2023-12-02 13:05:54,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:05:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 13:05:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:05:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 13:05:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 13:05:54,736 INFO L87 Difference]: Start difference. First operand 70960 states and 78383 transitions. Second operand has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-12-02 13:06:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:05,298 INFO L93 Difference]: Finished difference Result 150647 states and 167246 transitions. [2023-12-02 13:06:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 13:06:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) Word has length 515 [2023-12-02 13:06:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:05,425 INFO L225 Difference]: With dead ends: 150647 [2023-12-02 13:06:05,425 INFO L226 Difference]: Without dead ends: 112304 [2023-12-02 13:06:05,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1421 SyntacticMatches, 70 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5377 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=521, Invalid=3511, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 13:06:05,451 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 71 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:05,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1002 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:06:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112304 states. [2023-12-02 13:06:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112304 to 78910. [2023-12-02 13:06:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78910 states, 73976 states have (on average 1.0409457121228507) internal successors, (77005), 73978 states have internal predecessors, (77005), 4928 states have call successors, (4928), 3 states have call predecessors, (4928), 3 states have return successors, (4928), 4928 states have call predecessors, (4928), 4928 states have call successors, (4928) [2023-12-02 13:06:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78910 states to 78910 states and 86861 transitions. [2023-12-02 13:06:12,580 INFO L78 Accepts]: Start accepts. Automaton has 78910 states and 86861 transitions. Word has length 515 [2023-12-02 13:06:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:12,581 INFO L495 AbstractCegarLoop]: Abstraction has 78910 states and 86861 transitions. [2023-12-02 13:06:12,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-12-02 13:06:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 78910 states and 86861 transitions. [2023-12-02 13:06:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 13:06:12,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:12,597 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 24, 24, 24, 24, 24, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:12,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 13:06:12,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:12,797 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:06:12,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 212371069, now seen corresponding path program 19 times [2023-12-02 13:06:12,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:12,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367454296] [2023-12-02 13:06:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:12,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:12,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:06:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327726775] [2023-12-02 13:06:12,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:06:12,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:12,946 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:06:12,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 13:06:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:13,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 13:06:13,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:06:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 0 proven. 4812 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2023-12-02 13:06:14,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:06:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 0 proven. 4812 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2023-12-02 13:06:15,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367454296] [2023-12-02 13:06:15,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:06:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327726775] [2023-12-02 13:06:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327726775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:06:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [862141558] [2023-12-02 13:06:15,910 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:06:15,910 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:06:15,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:06:15,910 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:06:15,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:06:16,663 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:06:16,673 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:06:16,692 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:06:23,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1723389#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:06:23,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:06:23,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:06:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 13:06:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931300473] [2023-12-02 13:06:23,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:06:23,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 13:06:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 13:06:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 13:06:23,591 INFO L87 Difference]: Start difference. First operand 78910 states and 86861 transitions. Second operand has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 13:06:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:35,667 INFO L93 Difference]: Finished difference Result 92273 states and 101635 transitions. [2023-12-02 13:06:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 13:06:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 515 [2023-12-02 13:06:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:35,769 INFO L225 Difference]: With dead ends: 92273 [2023-12-02 13:06:35,769 INFO L226 Difference]: Without dead ends: 92272 [2023-12-02 13:06:35,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1436 SyntacticMatches, 60 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1791, Invalid=9551, Unknown=0, NotChecked=0, Total=11342 [2023-12-02 13:06:35,785 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 499 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:35,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1167 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 13:06:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92272 states. [2023-12-02 13:06:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92272 to 85759. [2023-12-02 13:06:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85759 states, 80397 states have (on average 1.040673159446248) internal successors, (83667), 80399 states have internal predecessors, (83667), 5356 states have call successors, (5356), 3 states have call predecessors, (5356), 3 states have return successors, (5356), 5356 states have call predecessors, (5356), 5356 states have call successors, (5356) [2023-12-02 13:06:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85759 states to 85759 states and 94379 transitions. [2023-12-02 13:06:43,815 INFO L78 Accepts]: Start accepts. Automaton has 85759 states and 94379 transitions. Word has length 515 [2023-12-02 13:06:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:43,816 INFO L495 AbstractCegarLoop]: Abstraction has 85759 states and 94379 transitions. [2023-12-02 13:06:43,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 13:06:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 85759 states and 94379 transitions. [2023-12-02 13:06:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 13:06:43,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:43,833 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:43,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 13:06:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:44,033 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:06:44,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash -632059295, now seen corresponding path program 20 times [2023-12-02 13:06:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364811916] [2023-12-02 13:06:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:44,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:06:44,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513920033] [2023-12-02 13:06:44,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:06:44,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:44,053 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:06:44,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 13:06:44,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-12-02 13:06:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:06:44,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 13:06:44,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:06:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6106 backedges. 1253 proven. 278 refuted. 0 times theorem prover too weak. 4575 trivial. 0 not checked. [2023-12-02 13:06:45,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:06:45,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364811916] [2023-12-02 13:06:45,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:06:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513920033] [2023-12-02 13:06:45,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513920033] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:06:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803610846] [2023-12-02 13:06:45,606 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:06:45,606 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:06:45,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:06:45,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:06:45,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:06:46,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:06:46,456 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:06:46,474 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:06:51,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925440#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:06:51,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:06:51,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:06:51,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 13:06:51,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316895694] [2023-12-02 13:06:51,818 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:06:51,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 13:06:51,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:51,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 13:06:51,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 13:06:51,819 INFO L87 Difference]: Start difference. First operand 85759 states and 94379 transitions. Second operand has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 13:06:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:58,810 INFO L93 Difference]: Finished difference Result 119983 states and 132015 transitions. [2023-12-02 13:06:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 13:06:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 515 [2023-12-02 13:06:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:58,893 INFO L225 Difference]: With dead ends: 119983 [2023-12-02 13:06:58,893 INFO L226 Difference]: Without dead ends: 70831 [2023-12-02 13:06:58,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 928 SyntacticMatches, 70 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=382, Invalid=3040, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 13:06:58,923 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:58,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 147 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:06:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70831 states. [2023-12-02 13:07:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70831 to 70830. [2023-12-02 13:07:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70830 states, 66399 states have (on average 1.0406030211298363) internal successors, (69095), 66401 states have internal predecessors, (69095), 4425 states have call successors, (4425), 3 states have call predecessors, (4425), 3 states have return successors, (4425), 4425 states have call predecessors, (4425), 4425 states have call successors, (4425) [2023-12-02 13:07:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70830 states to 70830 states and 77945 transitions. [2023-12-02 13:07:05,438 INFO L78 Accepts]: Start accepts. Automaton has 70830 states and 77945 transitions. Word has length 515 [2023-12-02 13:07:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:05,438 INFO L495 AbstractCegarLoop]: Abstraction has 70830 states and 77945 transitions. [2023-12-02 13:07:05,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 13:07:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 70830 states and 77945 transitions. [2023-12-02 13:07:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-12-02 13:07:05,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:05,447 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 27, 27, 27, 27, 27, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:05,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 13:07:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:05,648 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:07:05,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2020269871, now seen corresponding path program 21 times [2023-12-02 13:07:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:05,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856156637] [2023-12-02 13:07:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:05,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:07:05,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720086873] [2023-12-02 13:07:05,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:07:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:07:05,668 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:07:05,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 13:07:05,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:07:05,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:07:05,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 13:07:05,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:07:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7181 backedges. 2755 proven. 3612 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-02 13:07:06,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:07:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7181 backedges. 2755 proven. 3612 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-02 13:07:07,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856156637] [2023-12-02 13:07:07,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:07:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720086873] [2023-12-02 13:07:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720086873] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:07:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [888129679] [2023-12-02 13:07:07,407 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:07:07,407 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:07:07,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:07:07,407 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:07:07,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:07:08,270 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:07:08,281 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:07:08,299 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:07:15,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2143424#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:07:15,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:07:15,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:07:15,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 51 [2023-12-02 13:07:15,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436262864] [2023-12-02 13:07:15,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:07:15,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 13:07:15,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 13:07:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4498, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 13:07:15,527 INFO L87 Difference]: Start difference. First operand 70830 states and 77945 transitions. Second operand has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) [2023-12-02 13:07:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:31,683 INFO L93 Difference]: Finished difference Result 185906 states and 206035 transitions. [2023-12-02 13:07:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 13:07:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) Word has length 533 [2023-12-02 13:07:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:31,850 INFO L225 Difference]: With dead ends: 185906 [2023-12-02 13:07:31,850 INFO L226 Difference]: Without dead ends: 149065 [2023-12-02 13:07:31,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1454 SyntacticMatches, 71 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10288 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2137, Invalid=10295, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 13:07:31,879 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 401 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:31,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2566 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 13:07:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149065 states. [2023-12-02 13:07:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149065 to 94019. [2023-12-02 13:07:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94019 states, 88142 states have (on average 1.0312677270767625) internal successors, (90898), 88144 states have internal predecessors, (90898), 5871 states have call successors, (5871), 3 states have call predecessors, (5871), 3 states have return successors, (5871), 5871 states have call predecessors, (5871), 5871 states have call successors, (5871) [2023-12-02 13:07:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94019 states to 94019 states and 102640 transitions. [2023-12-02 13:07:41,195 INFO L78 Accepts]: Start accepts. Automaton has 94019 states and 102640 transitions. Word has length 533 [2023-12-02 13:07:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:41,196 INFO L495 AbstractCegarLoop]: Abstraction has 94019 states and 102640 transitions. [2023-12-02 13:07:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) [2023-12-02 13:07:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 94019 states and 102640 transitions. [2023-12-02 13:07:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-02 13:07:41,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:41,208 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 24, 24, 24, 24, 24, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:41,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 13:07:41,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:41,409 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:07:41,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1841017413, now seen corresponding path program 22 times [2023-12-02 13:07:41,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:41,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898907767] [2023-12-02 13:07:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:41,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:41,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:07:41,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353278450] [2023-12-02 13:07:41,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:07:41,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:07:41,430 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:07:41,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 13:07:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:41,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:07:41,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:07:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 6676 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2023-12-02 13:07:42,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:07:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 6676 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2023-12-02 13:07:46,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898907767] [2023-12-02 13:07:46,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:07:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353278450] [2023-12-02 13:07:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353278450] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:07:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417736022] [2023-12-02 13:07:46,711 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:07:46,711 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:07:46,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:07:46,711 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:07:46,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:07:47,611 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:07:47,621 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:07:47,640 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:07:54,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2461922#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:07:54,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:07:54,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:07:54,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 13:07:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405097967] [2023-12-02 13:07:54,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:07:54,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 13:07:54,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 13:07:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 13:07:54,977 INFO L87 Difference]: Start difference. First operand 94019 states and 102640 transitions. Second operand has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:08:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:08:11,420 INFO L93 Difference]: Finished difference Result 122417 states and 133684 transitions. [2023-12-02 13:08:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-02 13:08:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 587 [2023-12-02 13:08:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:08:11,553 INFO L225 Difference]: With dead ends: 122417 [2023-12-02 13:08:11,553 INFO L226 Difference]: Without dead ends: 122416 [2023-12-02 13:08:11,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1638 SyntacticMatches, 72 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1592, Invalid=8710, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 13:08:11,566 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 404 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:08:11,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1397 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 13:08:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122416 states. [2023-12-02 13:08:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122416 to 118784. [2023-12-02 13:08:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118784 states, 111359 states have (on average 1.0307204626478328) internal successors, (114780), 111361 states have internal predecessors, (114780), 7419 states have call successors, (7419), 3 states have call predecessors, (7419), 3 states have return successors, (7419), 7419 states have call predecessors, (7419), 7419 states have call successors, (7419) [2023-12-02 13:08:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129618 transitions. [2023-12-02 13:08:23,262 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129618 transitions. Word has length 587 [2023-12-02 13:08:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:08:23,262 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129618 transitions. [2023-12-02 13:08:23,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:08:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129618 transitions. [2023-12-02 13:08:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2023-12-02 13:08:23,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:08:23,280 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:08:23,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 13:08:23,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 13:08:23,480 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:08:23,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:08:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 497912923, now seen corresponding path program 23 times [2023-12-02 13:08:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:08:23,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498799770] [2023-12-02 13:08:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:08:23,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:08:23,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:08:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906987512] [2023-12-02 13:08:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:08:23,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:08:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:08:23,503 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:08:23,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 13:08:24,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-02 13:08:24,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:08:24,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 13:08:24,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:08:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11693 backedges. 4478 proven. 875 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2023-12-02 13:08:24,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:08:24,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:08:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498799770] [2023-12-02 13:08:24,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:08:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906987512] [2023-12-02 13:08:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906987512] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:08:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210969675] [2023-12-02 13:08:24,854 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:08:24,854 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:08:24,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:08:24,854 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:08:24,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:08:26,067 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:08:26,081 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:08:26,112 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:08:32,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2735508#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:08:32,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:08:32,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:08:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-02 13:08:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423173975] [2023-12-02 13:08:32,927 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:08:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:08:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:08:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:08:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 13:08:32,928 INFO L87 Difference]: Start difference. First operand 118784 states and 129618 transitions. Second operand has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 13:08:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:08:46,543 INFO L93 Difference]: Finished difference Result 199958 states and 218578 transitions. [2023-12-02 13:08:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 13:08:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 677 [2023-12-02 13:08:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:08:46,677 INFO L225 Difference]: With dead ends: 199958 [2023-12-02 13:08:46,677 INFO L226 Difference]: Without dead ends: 118791 [2023-12-02 13:08:46,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1248 SyntacticMatches, 77 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 13:08:46,713 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 295 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:08:46,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1919 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:08:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118791 states. [2023-12-02 13:08:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118791 to 118784. [2023-12-02 13:08:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118784 states, 111359 states have (on average 1.0300469652205928) internal successors, (114705), 111361 states have internal predecessors, (114705), 7419 states have call successors, (7419), 3 states have call predecessors, (7419), 3 states have return successors, (7419), 7419 states have call predecessors, (7419), 7419 states have call successors, (7419) [2023-12-02 13:08:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129543 transitions. [2023-12-02 13:08:58,518 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129543 transitions. Word has length 677 [2023-12-02 13:08:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:08:58,519 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129543 transitions. [2023-12-02 13:08:58,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 13:08:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129543 transitions. [2023-12-02 13:08:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-12-02 13:08:58,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:08:58,538 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 36, 36, 36, 36, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:08:58,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 13:08:58,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 13:08:58,738 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:08:58,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:08:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 826231161, now seen corresponding path program 24 times [2023-12-02 13:08:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:08:58,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191090905] [2023-12-02 13:08:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:08:58,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:08:58,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:08:58,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300221222] [2023-12-02 13:08:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:08:58,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:08:58,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:08:58,761 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:08:58,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 13:08:58,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:08:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:08:58,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 13:08:58,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:09:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 0 proven. 8410 refuted. 0 times theorem prover too weak. 4072 trivial. 0 not checked. [2023-12-02 13:09:00,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:09:00,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:09:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191090905] [2023-12-02 13:09:00,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:09:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300221222] [2023-12-02 13:09:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300221222] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:09:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829569005] [2023-12-02 13:09:00,730 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:09:00,731 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:09:00,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:09:00,731 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:09:00,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:09:01,464 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:09:01,475 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:09:01,493 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:09:09,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3096321#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:09:09,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:09:09,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:09:09,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-02 13:09:09,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038656201] [2023-12-02 13:09:09,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:09:09,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 13:09:09,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:09:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 13:09:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 13:09:09,648 INFO L87 Difference]: Start difference. First operand 118784 states and 129543 transitions. Second operand has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 13:09:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:09:22,626 INFO L93 Difference]: Finished difference Result 120301 states and 131210 transitions. [2023-12-02 13:09:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 13:09:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 695 [2023-12-02 13:09:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:09:22,754 INFO L225 Difference]: With dead ends: 120301 [2023-12-02 13:09:22,754 INFO L226 Difference]: Without dead ends: 120300 [2023-12-02 13:09:22,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1276 SyntacticMatches, 78 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 13:09:22,766 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 49 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 6171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:09:22,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2299 Invalid, 6171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 13:09:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120300 states. [2023-12-02 13:09:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120300 to 119072. [2023-12-02 13:09:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119072 states, 111629 states have (on average 1.0299742898350788) internal successors, (114975), 111631 states have internal predecessors, (114975), 7437 states have call successors, (7437), 3 states have call predecessors, (7437), 3 states have return successors, (7437), 7437 states have call predecessors, (7437), 7437 states have call successors, (7437) [2023-12-02 13:09:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119072 states to 119072 states and 129849 transitions. [2023-12-02 13:09:34,604 INFO L78 Accepts]: Start accepts. Automaton has 119072 states and 129849 transitions. Word has length 695 [2023-12-02 13:09:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:09:34,605 INFO L495 AbstractCegarLoop]: Abstraction has 119072 states and 129849 transitions. [2023-12-02 13:09:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 13:09:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 119072 states and 129849 transitions. [2023-12-02 13:09:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2023-12-02 13:09:34,633 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:09:34,633 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:09:34,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 13:09:34,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 13:09:34,834 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:09:34,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:09:34,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1270239911, now seen corresponding path program 4 times [2023-12-02 13:09:34,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:09:34,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824493913] [2023-12-02 13:09:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:09:34,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:09:34,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:09:34,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382213125] [2023-12-02 13:09:34,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:09:34,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:09:34,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:09:34,858 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:09:34,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 13:09:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:09:35,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 13:09:35,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:09:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 0 proven. 11780 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 13:09:36,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:09:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 0 proven. 11780 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 13:09:38,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:09:38,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824493913] [2023-12-02 13:09:38,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:09:38,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382213125] [2023-12-02 13:09:38,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382213125] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:09:38,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1184260934] [2023-12-02 13:09:38,170 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:09:38,170 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:09:38,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:09:38,170 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:09:38,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:09:38,805 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:09:38,814 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:09:38,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:09:41,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3369989#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 13:09:41,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:09:41,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:09:41,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2023-12-02 13:09:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526314095] [2023-12-02 13:09:41,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:09:41,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-02 13:09:41,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:09:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-02 13:09:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 13:09:41,070 INFO L87 Difference]: Start difference. First operand 119072 states and 129849 transitions. Second operand has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) [2023-12-02 13:10:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:00,874 INFO L93 Difference]: Finished difference Result 189587 states and 206969 transitions. [2023-12-02 13:10:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-02 13:10:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) Word has length 708 [2023-12-02 13:10:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:01,104 INFO L225 Difference]: With dead ends: 189587 [2023-12-02 13:10:01,104 INFO L226 Difference]: Without dead ends: 189586 [2023-12-02 13:10:01,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2122 GetRequests, 2025 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 13:10:01,125 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1621 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:01,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 1081 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 13:10:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189586 states. [2023-12-02 13:10:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189586 to 189432. [2023-12-02 13:10:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189432 states, 177589 states have (on average 1.030103215852333) internal successors, (182935), 177591 states have internal predecessors, (182935), 11837 states have call successors, (11837), 3 states have call predecessors, (11837), 3 states have return successors, (11837), 11837 states have call predecessors, (11837), 11837 states have call successors, (11837) [2023-12-02 13:10:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189432 states to 189432 states and 206609 transitions. [2023-12-02 13:10:20,124 INFO L78 Accepts]: Start accepts. Automaton has 189432 states and 206609 transitions. Word has length 708 [2023-12-02 13:10:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:20,124 INFO L495 AbstractCegarLoop]: Abstraction has 189432 states and 206609 transitions. [2023-12-02 13:10:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) [2023-12-02 13:10:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 189432 states and 206609 transitions. [2023-12-02 13:10:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 13:10:20,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:20,144 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 37, 37, 37, 37, 37, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:20,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 13:10:20,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 13:10:20,344 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:10:20,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1076554911, now seen corresponding path program 25 times [2023-12-02 13:10:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:20,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170474428] [2023-12-02 13:10:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:20,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:10:20,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435295914] [2023-12-02 13:10:20,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:10:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:20,367 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:20,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 13:10:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:20,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 13:10:20,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13161 backedges. 3085 proven. 8592 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 13:10:21,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:10:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13161 backedges. 3085 proven. 8592 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 13:10:23,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170474428] [2023-12-02 13:10:23,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:10:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435295914] [2023-12-02 13:10:23,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435295914] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:10:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705296542] [2023-12-02 13:10:23,028 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:10:23,028 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:10:23,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:10:23,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:10:23,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:10:23,789 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:10:23,805 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:10:23,823 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:10:31,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3800756#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:10:31,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:10:31,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:10:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2023-12-02 13:10:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037493111] [2023-12-02 13:10:31,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:10:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 13:10:31,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 13:10:31,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5996, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 13:10:31,466 INFO L87 Difference]: Start difference. First operand 189432 states and 206609 transitions. Second operand has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 13:10:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:59,300 INFO L93 Difference]: Finished difference Result 349367 states and 382720 transitions. [2023-12-02 13:10:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 13:10:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) Word has length 713 [2023-12-02 13:10:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:59,780 INFO L225 Difference]: With dead ends: 349367 [2023-12-02 13:10:59,780 INFO L226 Difference]: Without dead ends: 271972 [2023-12-02 13:10:59,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2157 GetRequests, 1954 SyntacticMatches, 101 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1626, Invalid=9086, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 13:10:59,846 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 88 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:59,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3193 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 13:10:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271972 states. [2023-12-02 13:11:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271972 to 222301. [2023-12-02 13:11:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222301 states, 208406 states have (on average 1.026016525435928) internal successors, (213828), 208408 states have internal predecessors, (213828), 13889 states have call successors, (13889), 3 states have call predecessors, (13889), 3 states have return successors, (13889), 13889 states have call predecessors, (13889), 13889 states have call successors, (13889) [2023-12-02 13:11:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241606 transitions. [2023-12-02 13:11:22,476 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241606 transitions. Word has length 713 [2023-12-02 13:11:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:22,476 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241606 transitions. [2023-12-02 13:11:22,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 13:11:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241606 transitions. [2023-12-02 13:11:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 13:11:22,502 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:22,502 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 36, 36, 36, 36, 36, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:22,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 13:11:22,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:22,702 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:11:22,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:22,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2042293931, now seen corresponding path program 26 times [2023-12-02 13:11:22,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950183852] [2023-12-02 13:11:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:22,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:22,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:11:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814637762] [2023-12-02 13:11:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:11:22,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:22,725 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:22,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 13:11:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-02 13:11:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:11:22,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:11:22,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13025 backedges. 5077 proven. 1050 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2023-12-02 13:11:23,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:11:23,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:23,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950183852] [2023-12-02 13:11:23,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:11:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814637762] [2023-12-02 13:11:23,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814637762] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:11:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355091650] [2023-12-02 13:11:23,285 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:11:23,285 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:11:23,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:11:23,285 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:11:23,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:11:24,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:11:24,222 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:11:24,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:11:32,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4446029#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:11:32,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:11:32,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:11:32,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 13:11:32,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117713707] [2023-12-02 13:11:32,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:11:32,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 13:11:32,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 13:11:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 13:11:32,517 INFO L87 Difference]: Start difference. First operand 222301 states and 241606 transitions. Second operand has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-12-02 13:11:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:56,760 INFO L93 Difference]: Finished difference Result 385072 states and 418871 transitions. [2023-12-02 13:11:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 13:11:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 713 [2023-12-02 13:11:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:57,061 INFO L225 Difference]: With dead ends: 385072 [2023-12-02 13:11:57,061 INFO L226 Difference]: Without dead ends: 222308 [2023-12-02 13:11:57,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1315 SyntacticMatches, 81 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 13:11:57,135 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 237 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:57,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2143 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3650 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 13:11:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222308 states. [2023-12-02 13:12:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222308 to 222301. [2023-12-02 13:12:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222301 states, 208406 states have (on average 1.0254647179063943) internal successors, (213713), 208408 states have internal predecessors, (213713), 13889 states have call successors, (13889), 3 states have call predecessors, (13889), 3 states have return successors, (13889), 13889 states have call predecessors, (13889), 13889 states have call successors, (13889) [2023-12-02 13:12:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241491 transitions. [2023-12-02 13:12:19,348 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241491 transitions. Word has length 713 [2023-12-02 13:12:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:19,348 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241491 transitions. [2023-12-02 13:12:19,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-12-02 13:12:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241491 transitions. [2023-12-02 13:12:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-12-02 13:12:19,370 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:19,371 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 38, 38, 38, 38, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:19,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 13:12:19,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:19,571 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:12:19,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash -685247287, now seen corresponding path program 27 times [2023-12-02 13:12:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:19,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35470194] [2023-12-02 13:12:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:19,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:19,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:12:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357655208] [2023-12-02 13:12:19,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:12:19,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:19,595 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:19,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 13:12:19,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:12:19,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:12:19,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 13:12:19,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 0 proven. 9332 refuted. 0 times theorem prover too weak. 4526 trivial. 0 not checked. [2023-12-02 13:12:21,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:12:21,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35470194] [2023-12-02 13:12:21,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:12:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357655208] [2023-12-02 13:12:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357655208] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305609785] [2023-12-02 13:12:21,711 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:12:21,711 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:12:21,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:12:21,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:12:21,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:12:22,509 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:12:22,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:12:22,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:12:30,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5131679#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:12:30,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:12:30,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:12:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-02 13:12:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194433553] [2023-12-02 13:12:30,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:12:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 13:12:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 13:12:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 13:12:30,606 INFO L87 Difference]: Start difference. First operand 222301 states and 241491 transitions. Second operand has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-02 13:12:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:52,916 INFO L93 Difference]: Finished difference Result 223816 states and 243154 transitions. [2023-12-02 13:12:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 13:12:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 731 [2023-12-02 13:12:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:53,193 INFO L225 Difference]: With dead ends: 223816 [2023-12-02 13:12:53,194 INFO L226 Difference]: Without dead ends: 223815 [2023-12-02 13:12:53,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1343 SyntacticMatches, 82 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=172, Invalid=2378, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 13:12:53,217 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 50 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 6728 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:53,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2517 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6728 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 13:12:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223815 states. [2023-12-02 13:13:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223815 to 222605. [2023-12-02 13:13:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222605 states, 208691 states have (on average 1.0254299418757877) internal successors, (213998), 208693 states have internal predecessors, (213998), 13908 states have call successors, (13908), 3 states have call predecessors, (13908), 3 states have return successors, (13908), 13908 states have call predecessors, (13908), 13908 states have call successors, (13908) [2023-12-02 13:13:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222605 states to 222605 states and 241814 transitions. [2023-12-02 13:13:15,243 INFO L78 Accepts]: Start accepts. Automaton has 222605 states and 241814 transitions. Word has length 731 [2023-12-02 13:13:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:13:15,244 INFO L495 AbstractCegarLoop]: Abstraction has 222605 states and 241814 transitions. [2023-12-02 13:13:15,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-02 13:13:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 222605 states and 241814 transitions. [2023-12-02 13:13:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2023-12-02 13:13:15,269 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:13:15,270 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 39, 39, 39, 39, 39, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:13:15,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-12-02 13:13:15,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:15,470 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 13:13:15,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:13:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 342158001, now seen corresponding path program 28 times [2023-12-02 13:13:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:13:15,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056224173] [2023-12-02 13:13:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:13:15,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:13:15,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498716547] [2023-12-02 13:13:15,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:13:15,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:15,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:13:15,674 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:13:15,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02dbd5d1-a10a-4586-b959-c311b3f0da04/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 13:13:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:15,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 13:13:15,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:13:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14573 backedges. 3407 proven. 9524 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2023-12-02 13:13:17,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:13:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14573 backedges. 3407 proven. 9524 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2023-12-02 13:13:18,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:13:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056224173] [2023-12-02 13:13:18,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:13:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498716547] [2023-12-02 13:13:18,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498716547] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:13:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963625557] [2023-12-02 13:13:18,478 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:13:18,479 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:13:18,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:13:18,479 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:13:18,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:13:19,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 13:13:19,266 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 13:13:19,285 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:13:25,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5638517#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:13:25,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:13:25,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:13:25,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2023-12-02 13:13:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988095105] [2023-12-02 13:13:25,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:13:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-02 13:13:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:13:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-02 13:13:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=6421, Unknown=0, NotChecked=0, Total=7482 [2023-12-02 13:13:25,646 INFO L87 Difference]: Start difference. First operand 222605 states and 241814 transitions. Second operand has 64 states, 64 states have (on average 14.390625) internal successors, (921), 64 states have internal predecessors, (921), 62 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 62 states have call predecessors, (63), 62 states have call successors, (63) [2023-12-02 13:14:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:14:00,171 INFO L93 Difference]: Finished difference Result 382310 states and 417483 transitions. [2023-12-02 13:14:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 13:14:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 14.390625) internal successors, (921), 64 states have internal predecessors, (921), 62 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 62 states have call predecessors, (63), 62 states have call successors, (63) Word has length 749 [2023-12-02 13:14:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:14:00,610 INFO L225 Difference]: With dead ends: 382310 [2023-12-02 13:14:00,610 INFO L226 Difference]: Without dead ends: 304915 [2023-12-02 13:14:00,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2266 GetRequests, 2097 SyntacticMatches, 63 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9693 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1775, Invalid=9781, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 13:14:00,675 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 91 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 3904 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:14:00,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2271 Invalid, 3906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3904 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 13:14:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304915 states.