./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/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_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5b1459048f386d4d91aa4d1371a4e9edda9e34036124ce3aa9f0ad83bf94de0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:50:18,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:50:18,442 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:50:18,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:50:18,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:50:18,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:50:18,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:50:18,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:50:18,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:50:18,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:50:18,482 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:50:18,482 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:50:18,483 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:50:18,484 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:50:18,484 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:50:18,485 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:50:18,485 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:50:18,486 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:50:18,486 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:50:18,487 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:50:18,488 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:50:18,489 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:50:18,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:50:18,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:50:18,490 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:50:18,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:50:18,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:50:18,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:50:18,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:50:18,493 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:50:18,493 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:50:18,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:50:18,494 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:50:18,494 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:50:18,494 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:50:18,495 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:50:18,495 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:50:18,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:50:18,496 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:50:18,496 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:50:18,496 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:50:18,496 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:50:18,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:50:18,497 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:50:18,497 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:50:18,497 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:50:18,498 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:50:18,498 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_162fec3e-f475-4937-be0e-e4c682e2c773/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5b1459048f386d4d91aa4d1371a4e9edda9e34036124ce3aa9f0ad83bf94de0 [2023-12-02 14:50:18,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:50:18,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:50:18,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:50:18,776 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:50:18,776 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:50:18,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i [2023-12-02 14:50:21,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:50:22,121 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:50:22,122 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i [2023-12-02 14:50:22,133 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data/6478b3737/04054af3760148e5a9fe4ab4973ed28c/FLAGd8c464133 [2023-12-02 14:50:22,149 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data/6478b3737/04054af3760148e5a9fe4ab4973ed28c [2023-12-02 14:50:22,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:50:22,154 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:50:22,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:50:22,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:50:22,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:50:22,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a62d539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22, skipping insertion in model container [2023-12-02 14:50:22,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,200 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:50:22,361 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i[915,928] [2023-12-02 14:50:22,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:50:22,434 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:50:22,448 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i[915,928] [2023-12-02 14:50:22,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:50:22,502 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:50:22,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22 WrapperNode [2023-12-02 14:50:22,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:50:22,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:50:22,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:50:22,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:50:22,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,564 INFO L138 Inliner]: procedures = 26, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 123 [2023-12-02 14:50:22,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:50:22,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:50:22,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:50:22,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:50:22,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,581 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:50:22,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:50:22,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:50:22,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:50:22,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (1/1) ... [2023-12-02 14:50:22,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:50:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:22,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:50:22,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:50:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:50:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 14:50:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 14:50:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:50:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:50:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:50:22,781 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:50:22,784 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:50:23,088 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:50:23,279 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:50:23,279 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:50:23,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:23 BoogieIcfgContainer [2023-12-02 14:50:23,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:50:23,285 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:50:23,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:50:23,289 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:50:23,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:50:22" (1/3) ... [2023-12-02 14:50:23,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2214ee76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:50:23, skipping insertion in model container [2023-12-02 14:50:23,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:22" (2/3) ... [2023-12-02 14:50:23,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2214ee76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:50:23, skipping insertion in model container [2023-12-02 14:50:23,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:23" (3/3) ... [2023-12-02 14:50:23,293 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount50_file-42.i [2023-12-02 14:50:23,315 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:50:23,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:50:23,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:50:23,375 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;@2fdcf529, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:50:23,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:50:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:50:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 14:50:23,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:23,390 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:23,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:23,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash -681676950, now seen corresponding path program 1 times [2023-12-02 14:50:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519840801] [2023-12-02 14:50:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:23,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:23,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:50:23,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869800566] [2023-12-02 14:50:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:23,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:23,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:23,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:23,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:50:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:50:23,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:50:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:50:23,868 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:50:23,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:50:23,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 14:50:23,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:24,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 14:50:24,082 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 14:50:24,085 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:50:24,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:50:24 BoogieIcfgContainer [2023-12-02 14:50:24,136 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:50:24,136 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:50:24,136 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:50:24,137 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:50:24,137 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:23" (3/4) ... [2023-12-02 14:50:24,139 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 14:50:24,140 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:50:24,141 INFO L158 Benchmark]: Toolchain (without parser) took 1986.70ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 126.0MB in the beginning and 115.1MB in the end (delta: 10.9MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. [2023-12-02 14:50:24,142 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 157.3MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:50:24,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.01ms. Allocated memory is still 157.3MB. Free memory was 126.0MB in the beginning and 112.5MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 14:50:24,143 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.98ms. Allocated memory is still 157.3MB. Free memory was 112.5MB in the beginning and 109.0MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 14:50:24,143 INFO L158 Benchmark]: Boogie Preprocessor took 44.35ms. Allocated memory is still 157.3MB. Free memory was 109.0MB in the beginning and 106.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:50:24,144 INFO L158 Benchmark]: RCFGBuilder took 670.86ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 106.9MB in the beginning and 147.5MB in the end (delta: -40.7MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. [2023-12-02 14:50:24,144 INFO L158 Benchmark]: TraceAbstraction took 850.83ms. Allocated memory is still 188.7MB. Free memory was 146.6MB in the beginning and 116.1MB in the end (delta: 30.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-12-02 14:50:24,145 INFO L158 Benchmark]: Witness Printer took 3.68ms. Allocated memory is still 188.7MB. Free memory was 116.1MB in the beginning and 115.1MB in the end (delta: 954.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:50:24,148 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 157.3MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.01ms. Allocated memory is still 157.3MB. Free memory was 126.0MB in the beginning and 112.5MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.98ms. Allocated memory is still 157.3MB. Free memory was 112.5MB in the beginning and 109.0MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.35ms. Allocated memory is still 157.3MB. Free memory was 109.0MB in the beginning and 106.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 670.86ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 106.9MB in the beginning and 147.5MB in the end (delta: -40.7MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. * TraceAbstraction took 850.83ms. Allocated memory is still 188.7MB. Free memory was 146.6MB in the beginning and 116.1MB in the end (delta: 30.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 3.68ms. Allocated memory is still 188.7MB. Free memory was 116.1MB in the beginning and 115.1MB in the end (delta: 954.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 54, overapproximation of someUnaryDOUBLEoperation at line 30, overapproximation of someBinaryArithmeticFLOAToperation at line 47. Possible FailurePath: [L21] unsigned char isInitial = 0; [L22] signed short int var_1_1 = 16; [L23] signed char var_1_5 = -8; [L24] unsigned char var_1_6 = 10; [L25] unsigned char var_1_7 = 128; [L26] unsigned char var_1_8 = 1; [L27] unsigned char var_1_11 = 0; [L28] unsigned char var_1_12 = 0; [L29] signed short int var_1_13 = 200; [L30] float var_1_14 = -0.8; [L31] float var_1_15 = 127.25; [L32] float var_1_16 = 3.5; [L33] unsigned short int var_1_17 = 16; [L34] unsigned char var_1_19 = 1; [L35] unsigned char var_1_20 = 0; [L36] signed short int last_1_var_1_1 = 16; [L37] unsigned char last_1_var_1_6 = 10; [L38] unsigned char last_1_var_1_8 = 1; [L39] signed short int last_1_var_1_13 = 200; [L127] isInitial = 1 [L128] FCALL initially() [L129] COND TRUE 1 [L130] CALL updateLastVariables() [L117] last_1_var_1_1 = var_1_1 [L118] last_1_var_1_6 = var_1_6 [L119] last_1_var_1_8 = var_1_8 [L120] last_1_var_1_13 = var_1_13 [L130] RET updateLastVariables() [L131] CALL updateVariables() [L96] var_1_5 = __VERIFIER_nondet_char() [L97] CALL assume_abort_if_not(var_1_5 >= -127) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=128, var_1_8=1] [L20] COND FALSE !(!cond) [L97] RET assume_abort_if_not(var_1_5 >= -127) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=128, var_1_8=1] [L98] CALL assume_abort_if_not(var_1_5 <= 127) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=128, var_1_8=1] [L20] COND FALSE !(!cond) [L98] RET assume_abort_if_not(var_1_5 <= 127) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=128, var_1_8=1] [L99] var_1_7 = __VERIFIER_nondet_uchar() [L100] CALL assume_abort_if_not(var_1_7 >= 127) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L100] RET assume_abort_if_not(var_1_7 >= 127) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L101] CALL assume_abort_if_not(var_1_7 <= 254) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L101] RET assume_abort_if_not(var_1_7 <= 254) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=0, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L102] var_1_11 = __VERIFIER_nondet_uchar() [L103] CALL assume_abort_if_not(var_1_11 >= 1) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L103] RET assume_abort_if_not(var_1_11 >= 1) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L104] CALL assume_abort_if_not(var_1_11 <= 1) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L104] RET assume_abort_if_not(var_1_11 <= 1) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L105] var_1_12 = __VERIFIER_nondet_uchar() [L106] CALL assume_abort_if_not(var_1_12 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L106] RET assume_abort_if_not(var_1_12 >= 0) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L107] CALL assume_abort_if_not(var_1_12 <= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L107] RET assume_abort_if_not(var_1_12 <= 0) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_15=509/4, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L108] var_1_15 = __VERIFIER_nondet_float() [L109] CALL assume_abort_if_not((var_1_15 >= -461168.6018427382800e+13F && var_1_15 <= -1.0e-20F) || (var_1_15 <= 4611686.018427382800e+12F && var_1_15 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L109] RET assume_abort_if_not((var_1_15 >= -461168.6018427382800e+13F && var_1_15 <= -1.0e-20F) || (var_1_15 <= 4611686.018427382800e+12F && var_1_15 >= 1.0e-20F )) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_16=7/2, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L110] var_1_16 = __VERIFIER_nondet_float() [L111] CALL assume_abort_if_not((var_1_16 >= -461168.6018427382800e+13F && var_1_16 <= -1.0e-20F) || (var_1_16 <= 4611686.018427382800e+12F && var_1_16 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L111] RET assume_abort_if_not((var_1_16 >= -461168.6018427382800e+13F && var_1_16 <= -1.0e-20F) || (var_1_16 <= 4611686.018427382800e+12F && var_1_16 >= 1.0e-20F )) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L112] var_1_20 = __VERIFIER_nondet_uchar() [L113] CALL assume_abort_if_not(var_1_20 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_17=16, var_1_19=1, var_1_1=16, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L113] RET assume_abort_if_not(var_1_20 >= 0) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_17=16, var_1_19=1, var_1_1=16, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L114] CALL assume_abort_if_not(var_1_20 <= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L20] COND FALSE !(!cond) [L114] RET assume_abort_if_not(var_1_20 <= 0) VAL [isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_17=16, var_1_19=1, var_1_1=16, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L131] RET updateVariables() [L132] CALL step() [L43] signed long int stepLocal_6 = last_1_var_1_1; [L44] unsigned char stepLocal_5 = ((((last_1_var_1_1) < (8)) ? (last_1_var_1_1) : (8))) <= var_1_5; [L45] COND TRUE stepLocal_5 || last_1_var_1_8 [L46] COND FALSE !(stepLocal_6 <= last_1_var_1_6) [L49] var_1_14 = var_1_16 [L54] COND FALSE !(var_1_14 <= var_1_15) [L57] COND FALSE !(var_1_5 >= -2) [L60] unsigned char stepLocal_4 = var_1_6; [L61] signed long int stepLocal_3 = var_1_6 / var_1_7; [L62] COND TRUE last_1_var_1_13 >= stepLocal_3 [L63] COND TRUE stepLocal_4 != ((((((((var_1_6) > (last_1_var_1_13)) ? (var_1_6) : (last_1_var_1_13)))) > (var_1_5)) ? (((((var_1_6) > (last_1_var_1_13)) ? (var_1_6) : (last_1_var_1_13)))) : (var_1_5))) [L64] var_1_13 = var_1_7 [L71] unsigned char stepLocal_7 = var_1_6; [L72] COND FALSE !(stepLocal_7 > var_1_6) [L75] unsigned char stepLocal_0 = var_1_6; [L76] COND TRUE \read(var_1_19) [L77] var_1_1 = ((((var_1_6) > (var_1_6)) ? (var_1_6) : (var_1_6))) [L83] unsigned char stepLocal_2 = var_1_19 && var_1_19; [L84] unsigned char stepLocal_1 = var_1_7; [L85] COND TRUE (49.5f <= var_1_14) && stepLocal_2 [L86] COND FALSE !(var_1_13 < stepLocal_1) [L89] var_1_8 = var_1_11 [L132] RET step() [L133] CALL, EXPR property() [L123-L124] return ((((((var_1_19 ? (var_1_1 == ((signed short int) ((((var_1_6) > (var_1_6)) ? (var_1_6) : (var_1_6))))) : ((((((var_1_5) < 0 ) ? -(var_1_5) : (var_1_5))) >= var_1_6) ? (var_1_1 == ((signed short int) var_1_5)) : 1)) && ((var_1_5 >= -2) ? (var_1_6 == ((unsigned char) (var_1_7 - 100))) : 1)) && (((49.5f <= var_1_14) && (var_1_19 && var_1_19)) ? ((var_1_13 < var_1_7) ? (var_1_8 == ((unsigned char) (var_1_19 || var_1_11))) : (var_1_8 == ((unsigned char) var_1_11))) : (var_1_8 == ((unsigned char) var_1_12)))) && ((last_1_var_1_13 >= (var_1_6 / var_1_7)) ? ((var_1_6 != ((((((((var_1_6) > (last_1_var_1_13)) ? (var_1_6) : (last_1_var_1_13)))) > (var_1_5)) ? (((((var_1_6) > (last_1_var_1_13)) ? (var_1_6) : (last_1_var_1_13)))) : (var_1_5)))) ? (var_1_13 == ((signed short int) var_1_7)) : (var_1_13 == ((signed short int) last_1_var_1_13))) : (var_1_13 == ((signed short int) var_1_6)))) && (((((((last_1_var_1_1) < (8)) ? (last_1_var_1_1) : (8))) <= var_1_5) || last_1_var_1_8) ? ((last_1_var_1_1 <= last_1_var_1_6) ? (var_1_14 == ((float) (var_1_15 + var_1_16))) : (var_1_14 == ((float) var_1_16))) : (var_1_14 == ((float) var_1_16)))) && ((var_1_6 > var_1_6) ? (var_1_17 == ((unsigned short int) ((((25) > ((var_1_13 + var_1_6))) ? (25) : ((var_1_13 + var_1_6)))))) : 1)) && ((var_1_14 <= var_1_15) ? (var_1_19 == ((unsigned char) (var_1_12 || var_1_20))) : 1) ; [L133] RET, EXPR property() [L133] CALL __VERIFIER_assert(property()) [L19] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_14=2, var_1_16=2, var_1_17=16, var_1_19=1, var_1_1=10, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, isInitial=1, last_1_var_1_13=200, last_1_var_1_1=16, last_1_var_1_6=10, last_1_var_1_8=1, var_1_11=1, var_1_12=0, var_1_13=200, var_1_14=2, var_1_16=2, var_1_17=16, var_1_19=1, var_1_1=10, var_1_20=0, var_1_5=-3, var_1_6=10, var_1_7=200, var_1_8=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 12, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 14:50:24,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/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_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5b1459048f386d4d91aa4d1371a4e9edda9e34036124ce3aa9f0ad83bf94de0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:50:26,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:50:26,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 14:50:26,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:50:26,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:50:26,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:50:26,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:50:26,440 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:50:26,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:50:26,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:50:26,442 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:50:26,443 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:50:26,443 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:50:26,444 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:50:26,444 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:50:26,445 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:50:26,446 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:50:26,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:50:26,447 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:50:26,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:50:26,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:50:26,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:50:26,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:50:26,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:50:26,451 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:50:26,451 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 14:50:26,452 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 14:50:26,452 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:50:26,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:50:26,453 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:50:26,454 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:50:26,454 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 14:50:26,454 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:50:26,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:50:26,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:50:26,455 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:50:26,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:50:26,456 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:50:26,456 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 14:50:26,456 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:26,457 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:50:26,457 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:50:26,457 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:50:26,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:50:26,458 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_162fec3e-f475-4937-be0e-e4c682e2c773/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5b1459048f386d4d91aa4d1371a4e9edda9e34036124ce3aa9f0ad83bf94de0 [2023-12-02 14:50:26,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:50:26,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:50:26,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:50:26,833 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:50:26,834 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:50:26,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i [2023-12-02 14:50:29,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:50:29,909 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:50:29,909 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i [2023-12-02 14:50:29,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data/76f22d6e6/38f070afe29741e5bd8489ebb1eba12f/FLAGb6f975397 [2023-12-02 14:50:29,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/data/76f22d6e6/38f070afe29741e5bd8489ebb1eba12f [2023-12-02 14:50:29,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:50:29,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:50:29,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:50:29,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:50:29,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:50:29,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:50:29" (1/1) ... [2023-12-02 14:50:29,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f07816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:29, skipping insertion in model container [2023-12-02 14:50:29,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:50:29" (1/1) ... [2023-12-02 14:50:29,991 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:50:30,159 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i[915,928] [2023-12-02 14:50:30,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:50:30,234 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:50:30,250 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-42.i[915,928] [2023-12-02 14:50:30,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:50:30,303 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:50:30,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30 WrapperNode [2023-12-02 14:50:30,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:50:30,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:50:30,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:50:30,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:50:30,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,358 INFO L138 Inliner]: procedures = 27, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 122 [2023-12-02 14:50:30,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:50:30,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:50:30,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:50:30,360 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:50:30,370 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,376 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,387 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,391 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,396 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,401 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:50:30,402 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:50:30,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:50:30,403 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:50:30,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (1/1) ... [2023-12-02 14:50:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:50:30,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:30,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:50:30,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:50:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:50:30,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 14:50:30,498 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 14:50:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 14:50:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:50:30,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:50:30,591 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:50:30,593 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:50:31,085 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:50:31,138 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:50:31,139 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:50:31,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:31 BoogieIcfgContainer [2023-12-02 14:50:31,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:50:31,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:50:31,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:50:31,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:50:31,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:50:29" (1/3) ... [2023-12-02 14:50:31,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478cd28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:50:31, skipping insertion in model container [2023-12-02 14:50:31,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:30" (2/3) ... [2023-12-02 14:50:31,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478cd28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:50:31, skipping insertion in model container [2023-12-02 14:50:31,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:31" (3/3) ... [2023-12-02 14:50:31,150 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount50_file-42.i [2023-12-02 14:50:31,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:50:31,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:50:31,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:50:31,233 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;@5a6ff91c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:50:31,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:50:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 32 states have (on average 1.5) internal successors, (48), 33 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:50:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 14:50:31,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:31,253 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:31,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:31,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1441148856, now seen corresponding path program 1 times [2023-12-02 14:50:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:31,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88768911] [2023-12-02 14:50:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:31,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:31,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:31,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:31,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 14:50:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:31,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 14:50:31,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-12-02 14:50:31,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:31,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:31,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88768911] [2023-12-02 14:50:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88768911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:50:31,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332088832] [2023-12-02 14:50:31,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:31,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 14:50:31,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 14:50:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:50:31,641 INFO L87 Difference]: Start difference. First operand has 47 states, 32 states have (on average 1.5) internal successors, (48), 33 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 14:50:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:31,835 INFO L93 Difference]: Finished difference Result 91 states and 154 transitions. [2023-12-02 14:50:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 14:50:31,845 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 83 [2023-12-02 14:50:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:31,853 INFO L225 Difference]: With dead ends: 91 [2023-12-02 14:50:31,853 INFO L226 Difference]: Without dead ends: 45 [2023-12-02 14:50:31,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 82 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 14:50:31,861 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:31,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:50:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-02 14:50:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-02 14:50:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:50:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 67 transitions. [2023-12-02 14:50:31,898 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 67 transitions. Word has length 83 [2023-12-02 14:50:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:31,899 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 67 transitions. [2023-12-02 14:50:31,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 14:50:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 67 transitions. [2023-12-02 14:50:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 14:50:31,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:31,904 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:31,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:32,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:32,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:32,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2116648844, now seen corresponding path program 1 times [2023-12-02 14:50:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295534801] [2023-12-02 14:50:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:32,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:32,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:32,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:32,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 14:50:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:32,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:50:32,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-02 14:50:32,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:32,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295534801] [2023-12-02 14:50:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295534801] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:32,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:50:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008601365] [2023-12-02 14:50:32,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:32,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:50:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:50:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:50:32,592 INFO L87 Difference]: Start difference. First operand 45 states and 67 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:33,008 INFO L93 Difference]: Finished difference Result 134 states and 200 transitions. [2023-12-02 14:50:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:50:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 83 [2023-12-02 14:50:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:33,018 INFO L225 Difference]: With dead ends: 134 [2023-12-02 14:50:33,019 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 14:50:33,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:50:33,021 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 63 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:33,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 186 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:50:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 14:50:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2023-12-02 14:50:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 14:50:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2023-12-02 14:50:33,045 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 83 [2023-12-02 14:50:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:33,046 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2023-12-02 14:50:33,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2023-12-02 14:50:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 14:50:33,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:33,048 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:33,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 14:50:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:33,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2013944679, now seen corresponding path program 1 times [2023-12-02 14:50:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598097197] [2023-12-02 14:50:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:33,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:33,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 14:50:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:33,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:50:33,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-02 14:50:34,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:34,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:34,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598097197] [2023-12-02 14:50:34,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598097197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:34,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:34,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:50:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380753821] [2023-12-02 14:50:34,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:34,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:50:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:50:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:50:34,094 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:35,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 14:50:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:36,109 INFO L93 Difference]: Finished difference Result 175 states and 259 transitions. [2023-12-02 14:50:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:50:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 84 [2023-12-02 14:50:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:36,121 INFO L225 Difference]: With dead ends: 175 [2023-12-02 14:50:36,121 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 14:50:36,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:50:36,124 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 93 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:36,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 231 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 14:50:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 14:50:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 112. [2023-12-02 14:50:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 36 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-12-02 14:50:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 167 transitions. [2023-12-02 14:50:36,154 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 167 transitions. Word has length 84 [2023-12-02 14:50:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:36,155 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 167 transitions. [2023-12-02 14:50:36,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 167 transitions. [2023-12-02 14:50:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 14:50:36,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:36,158 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:36,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 14:50:36,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:36,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:36,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1002827429, now seen corresponding path program 1 times [2023-12-02 14:50:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307342687] [2023-12-02 14:50:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:36,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:36,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:36,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 14:50:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:36,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:50:36,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-02 14:50:36,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:36,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307342687] [2023-12-02 14:50:36,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307342687] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:36,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:36,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:50:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581897534] [2023-12-02 14:50:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:50:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:50:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:50:36,609 INFO L87 Difference]: Start difference. First operand 112 states and 167 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:36,802 INFO L93 Difference]: Finished difference Result 198 states and 297 transitions. [2023-12-02 14:50:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:50:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 84 [2023-12-02 14:50:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:36,814 INFO L225 Difference]: With dead ends: 198 [2023-12-02 14:50:36,814 INFO L226 Difference]: Without dead ends: 112 [2023-12-02 14:50:36,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 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 14:50:36,817 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:36,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:50:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-02 14:50:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-12-02 14:50:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 36 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-12-02 14:50:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 165 transitions. [2023-12-02 14:50:36,844 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 165 transitions. Word has length 84 [2023-12-02 14:50:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:36,845 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 165 transitions. [2023-12-02 14:50:36,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 165 transitions. [2023-12-02 14:50:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 14:50:36,848 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:36,848 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:36,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:37,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:37,050 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:37,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash 193480803, now seen corresponding path program 1 times [2023-12-02 14:50:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930335311] [2023-12-02 14:50:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:37,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:37,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:37,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 14:50:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:37,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:50:37,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 149 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 14:50:37,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-02 14:50:37,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930335311] [2023-12-02 14:50:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930335311] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031712585] [2023-12-02 14:50:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:37,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:37,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:37,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:37,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-02 14:50:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:38,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:50:38,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-02 14:50:39,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:39,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2031712585] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:39,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:50:39,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 17 [2023-12-02 14:50:39,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720188938] [2023-12-02 14:50:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:39,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:50:39,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:50:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:50:39,144 INFO L87 Difference]: Start difference. First operand 112 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:42,519 INFO L93 Difference]: Finished difference Result 306 states and 442 transitions. [2023-12-02 14:50:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:50:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 84 [2023-12-02 14:50:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:42,531 INFO L225 Difference]: With dead ends: 306 [2023-12-02 14:50:42,531 INFO L226 Difference]: Without dead ends: 262 [2023-12-02 14:50:42,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-12-02 14:50:42,534 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 122 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:42,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 309 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 14:50:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-02 14:50:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 217. [2023-12-02 14:50:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.3243243243243243) internal successors, (196), 149 states have internal predecessors, (196), 62 states have call successors, (62), 6 states have call predecessors, (62), 6 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-02 14:50:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 320 transitions. [2023-12-02 14:50:42,589 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 320 transitions. Word has length 84 [2023-12-02 14:50:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:42,590 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 320 transitions. [2023-12-02 14:50:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 320 transitions. [2023-12-02 14:50:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 14:50:42,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:42,593 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:42,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-02 14:50:42,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 14:50:42,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:42,998 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:42,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 451646241, now seen corresponding path program 1 times [2023-12-02 14:50:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:42,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525939729] [2023-12-02 14:50:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:42,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:43,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:43,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 14:50:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:43,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:50:43,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 149 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 14:50:43,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-02 14:50:43,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525939729] [2023-12-02 14:50:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525939729] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [78289318] [2023-12-02 14:50:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:43,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:43,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:43,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 14:50:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:44,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:50:44,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-02 14:50:45,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [78289318] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:50:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 9] total 16 [2023-12-02 14:50:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542111694] [2023-12-02 14:50:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:50:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:50:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-12-02 14:50:45,101 INFO L87 Difference]: Start difference. First operand 217 states and 320 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:47,905 INFO L93 Difference]: Finished difference Result 373 states and 548 transitions. [2023-12-02 14:50:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:50:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 84 [2023-12-02 14:50:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:47,912 INFO L225 Difference]: With dead ends: 373 [2023-12-02 14:50:47,912 INFO L226 Difference]: Without dead ends: 287 [2023-12-02 14:50:47,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-12-02 14:50:47,914 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 76 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:47,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 245 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 14:50:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-12-02 14:50:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 259. [2023-12-02 14:50:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 178 states have internal predecessors, (234), 74 states have call successors, (74), 7 states have call predecessors, (74), 7 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-12-02 14:50:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2023-12-02 14:50:47,960 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 84 [2023-12-02 14:50:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:47,961 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2023-12-02 14:50:47,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 14:50:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2023-12-02 14:50:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 14:50:47,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:47,964 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:47,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 14:50:48,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 14:50:48,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:48,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:48,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1401081611, now seen corresponding path program 1 times [2023-12-02 14:50:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:48,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065257407] [2023-12-02 14:50:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:48,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:48,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:48,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:48,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 14:50:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:48,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:50:48,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 149 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 14:50:48,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-02 14:50:49,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065257407] [2023-12-02 14:50:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065257407] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951776652] [2023-12-02 14:50:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:49,068 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:49,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2023-12-02 14:50:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:49,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:50:49,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 149 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 14:50:49,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-02 14:50:49,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951776652] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:49,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028378056] [2023-12-02 14:50:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:49,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:49,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:50:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:49,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:50:49,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 149 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 14:50:50,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-02 14:50:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028378056] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:50,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:50:50,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 13 [2023-12-02 14:50:50,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335577266] [2023-12-02 14:50:50,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:50,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:50:50,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:50,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:50:50,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:50:50,258 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 14:50:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:51,614 INFO L93 Difference]: Finished difference Result 697 states and 945 transitions. [2023-12-02 14:50:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 14:50:51,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 85 [2023-12-02 14:50:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:51,619 INFO L225 Difference]: With dead ends: 697 [2023-12-02 14:50:51,619 INFO L226 Difference]: Without dead ends: 548 [2023-12-02 14:50:51,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 492 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 14:50:51,621 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 279 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:51,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 266 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 14:50:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-12-02 14:50:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 488. [2023-12-02 14:50:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 346 states have (on average 1.260115606936416) internal successors, (436), 348 states have internal predecessors, (436), 112 states have call successors, (112), 29 states have call predecessors, (112), 29 states have return successors, (112), 110 states have call predecessors, (112), 112 states have call successors, (112) [2023-12-02 14:50:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 660 transitions. [2023-12-02 14:50:51,695 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 660 transitions. Word has length 85 [2023-12-02 14:50:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:51,695 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 660 transitions. [2023-12-02 14:50:51,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 14:50:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 660 transitions. [2023-12-02 14:50:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 14:50:51,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:51,698 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:51,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2023-12-02 14:50:51,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 14:50:52,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:52,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:52,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:52,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1882768435, now seen corresponding path program 1 times [2023-12-02 14:50:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:52,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012594086] [2023-12-02 14:50:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:52,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:52,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:52,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162fec3e-f475-4937-be0e-e4c682e2c773/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 14:50:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:52,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 14:50:52,476 INFO L285 TraceCheckSpWp]: Computing forward predicates...