./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje --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 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:10:46,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:10:46,421 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:10:46,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:10:46,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:10:46,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:10:46,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:10:46,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:10:46,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:10:46,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:10:46,484 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:10:46,485 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:10:46,485 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:10:46,486 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:10:46,488 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:10:46,489 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:10:46,490 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:10:46,490 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:10:46,491 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:10:46,491 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:10:46,492 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:10:46,493 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:10:46,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:10:46,494 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:10:46,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:10:46,495 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:10:46,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:10:46,496 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:10:46,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:10:46,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:10:46,498 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:10:46,498 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:10:46,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:10:46,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:10:46,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:10:46,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:10:46,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:10:46,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:10:46,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:10:46,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:10:46,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:10:46,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:10:46,504 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:10:46,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:10:46,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:10:46,505 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:10:46,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:10:46,506 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_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca [2024-11-09 07:10:46,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:10:46,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:10:46,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:10:46,882 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:10:46,883 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:10:46,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c Unable to find full path for "g++" [2024-11-09 07:10:49,219 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:10:49,465 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:10:49,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2024-11-09 07:10:49,475 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/data/24532a425/6d422b12d9e9498fba297b66617f349c/FLAGd48cadfc5 [2024-11-09 07:10:49,814 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/data/24532a425/6d422b12d9e9498fba297b66617f349c [2024-11-09 07:10:49,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:10:49,820 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:10:49,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:10:49,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:10:49,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:10:49,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:10:49" (1/1) ... [2024-11-09 07:10:49,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ac91aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:49, skipping insertion in model container [2024-11-09 07:10:49,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:10:49" (1/1) ... [2024-11-09 07:10:49,857 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:10:50,063 WARN L250 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_79283406-c909-4ee1-a8b5-8591cca0c391/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2024-11-09 07:10:50,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:10:50,102 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:10:50,115 WARN L250 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_79283406-c909-4ee1-a8b5-8591cca0c391/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2024-11-09 07:10:50,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:10:50,149 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:10:50,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50 WrapperNode [2024-11-09 07:10:50,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:10:50,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:10:50,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:10:50,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:10:50,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,170 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,195 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-09 07:10:50,196 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:10:50,197 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:10:50,197 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:10:50,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:10:50,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,212 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:10:50,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:10:50,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:10:50,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:10:50,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (1/1) ... [2024-11-09 07:10:50,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:10:50,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:50,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:10:50,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:10:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:10:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:10:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:10:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:10:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 07:10:50,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 07:10:50,408 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:10:50,410 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:10:50,663 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 07:10:50,663 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:10:50,832 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:10:50,833 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 07:10:50,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:50 BoogieIcfgContainer [2024-11-09 07:10:50,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:10:50,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:10:50,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:10:50,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:10:50,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:10:49" (1/3) ... [2024-11-09 07:10:50,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b96465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:10:50, skipping insertion in model container [2024-11-09 07:10:50,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:50" (2/3) ... [2024-11-09 07:10:50,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b96465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:10:50, skipping insertion in model container [2024-11-09 07:10:50,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:50" (3/3) ... [2024-11-09 07:10:50,853 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2024-11-09 07:10:50,870 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:10:50,870 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:10:50,938 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:10:50,946 INFO L333 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, 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;@63db75ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:10:50,946 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:10:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 07:10:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:10:50,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:50,960 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:10:50,961 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:50,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:50,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1305450280, now seen corresponding path program 1 times [2024-11-09 07:10:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:50,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748109707] [2024-11-09 07:10:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:51,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748109707] [2024-11-09 07:10:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748109707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:51,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:10:51,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403334571] [2024-11-09 07:10:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:51,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 07:10:51,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 07:10:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 07:10:51,210 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:51,250 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2024-11-09 07:10:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 07:10:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 07:10:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:51,263 INFO L225 Difference]: With dead ends: 29 [2024-11-09 07:10:51,263 INFO L226 Difference]: Without dead ends: 13 [2024-11-09 07:10:51,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 07:10:51,277 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:51,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-09 07:10:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-09 07:10:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:10:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-09 07:10:51,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2024-11-09 07:10:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:51,325 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-09 07:10:51,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-09 07:10:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:10:51,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:51,327 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:51,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:10:51,328 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:51,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1607447807, now seen corresponding path program 1 times [2024-11-09 07:10:51,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111479261] [2024-11-09 07:10:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:51,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:51,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111479261] [2024-11-09 07:10:51,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111479261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:51,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:51,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:51,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627589283] [2024-11-09 07:10:51,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:51,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:51,467 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:51,504 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-09 07:10:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 07:10:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:51,507 INFO L225 Difference]: With dead ends: 23 [2024-11-09 07:10:51,507 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 07:10:51,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:51,510 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:51,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 07:10:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 07:10:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:10:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-09 07:10:51,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2024-11-09 07:10:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:51,519 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-09 07:10:51,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-09 07:10:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:10:51,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:51,521 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:51,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:10:51,522 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:51,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1609235267, now seen corresponding path program 1 times [2024-11-09 07:10:51,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359900444] [2024-11-09 07:10:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:51,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:10:51,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134745497] [2024-11-09 07:10:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:51,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:51,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:51,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:10:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:51,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:10:51,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:51,968 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:10:51,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359900444] [2024-11-09 07:10:51,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:10:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134745497] [2024-11-09 07:10:51,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134745497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:51,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:51,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:10:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695317030] [2024-11-09 07:10:51,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:51,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:51,974 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:52,064 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-11-09 07:10:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 07:10:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:52,066 INFO L225 Difference]: With dead ends: 25 [2024-11-09 07:10:52,067 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 07:10:52,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:10:52,069 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:52,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 07:10:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-09 07:10:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 07:10:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-09 07:10:52,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2024-11-09 07:10:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:52,081 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-09 07:10:52,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-09 07:10:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:10:52,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:52,083 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:52,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:10:52,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:52,288 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:52,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1472800496, now seen corresponding path program 1 times [2024-11-09 07:10:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071244906] [2024-11-09 07:10:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:52,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:10:52,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345873242] [2024-11-09 07:10:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:52,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:52,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:52,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:10:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:52,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:10:52,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:52,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:53,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:53,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071244906] [2024-11-09 07:10:53,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:10:53,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345873242] [2024-11-09 07:10:53,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345873242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735528043] [2024-11-09 07:10:53,065 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 07:10:53,065 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:53,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:53,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:53,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:53,421 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2024-11-09 07:10:53,451 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1735528043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:54,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:10:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 18 [2024-11-09 07:10:54,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924089447] [2024-11-09 07:10:54,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:54,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:10:54,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:10:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:10:54,740 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 07:10:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:54,900 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-09 07:10:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:10:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-09 07:10:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:54,902 INFO L225 Difference]: With dead ends: 29 [2024-11-09 07:10:54,902 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 07:10:54,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:10:54,904 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:54,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 07:10:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-09 07:10:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 07:10:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-09 07:10:54,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-09 07:10:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:54,913 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-09 07:10:54,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 07:10:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-09 07:10:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 07:10:54,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:54,914 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:54,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:10:55,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:55,123 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:55,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash -984927605, now seen corresponding path program 1 times [2024-11-09 07:10:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:55,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165307607] [2024-11-09 07:10:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:55,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:55,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:55,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165307607] [2024-11-09 07:10:55,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165307607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135134951] [2024-11-09 07:10:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:55,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:55,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:10:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:55,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 07:10:55,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:55,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:55,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135134951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411053050] [2024-11-09 07:10:55,466 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 07:10:55,468 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:55,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:55,471 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:55,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:56,493 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2024-11-09 07:10:56,617 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:57,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:10:57,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:57,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:57,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-09 07:10:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864469179] [2024-11-09 07:10:57,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:57,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:10:57,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:10:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:10:57,874 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 07:10:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:58,026 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-11-09 07:10:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:10:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-11-09 07:10:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:58,028 INFO L225 Difference]: With dead ends: 55 [2024-11-09 07:10:58,029 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 07:10:58,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-09 07:10:58,031 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:58,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 07:10:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-11-09 07:10:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:10:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-09 07:10:58,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2024-11-09 07:10:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:58,055 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-09 07:10:58,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 07:10:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-09 07:10:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 07:10:58,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:58,057 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:58,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:10:58,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:58,263 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:58,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash -983140145, now seen corresponding path program 1 times [2024-11-09 07:10:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:58,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174795319] [2024-11-09 07:10:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:58,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:10:58,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605638546] [2024-11-09 07:10:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:58,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:58,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:58,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:10:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:58,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 07:10:58,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:59,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:00,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174795319] [2024-11-09 07:11:00,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:11:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605638546] [2024-11-09 07:11:00,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605638546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334995522] [2024-11-09 07:11:00,537 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 07:11:00,539 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:00,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:00,540 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:00,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:01,175 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2024-11-09 07:11:01,214 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:01,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 20))' at error location [2024-11-09 07:11:01,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:01,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:11:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-09 07:11:01,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386806895] [2024-11-09 07:11:01,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:01,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:11:01,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:11:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-09 07:11:01,881 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:11:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:02,061 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-11-09 07:11:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:11:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-09 07:11:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:02,064 INFO L225 Difference]: With dead ends: 57 [2024-11-09 07:11:02,064 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 07:11:02,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:11:02,065 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:02,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:11:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 07:11:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2024-11-09 07:11:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 07:11:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-11-09 07:11:02,089 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 15 [2024-11-09 07:11:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:02,089 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-11-09 07:11:02,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:11:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-11-09 07:11:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 07:11:02,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:02,091 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:02,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:11:02,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 07:11:02,296 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:02,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:02,297 INFO L85 PathProgramCache]: Analyzing trace with hash -841266308, now seen corresponding path program 1 times [2024-11-09 07:11:02,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:02,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027719134] [2024-11-09 07:11:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:11:02,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32264150] [2024-11-09 07:11:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:02,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:02,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:11:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:02,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:11:02,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:11:02,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:11:02,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027719134] [2024-11-09 07:11:02,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:11:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32264150] [2024-11-09 07:11:02,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32264150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:02,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821758358] [2024-11-09 07:11:02,737 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 07:11:02,737 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:02,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:02,738 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:02,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:03,355 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2024-11-09 07:11:03,431 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:04,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1039#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 20))' at error location [2024-11-09 07:11:04,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:04,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:11:04,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-11-09 07:11:04,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008240872] [2024-11-09 07:11:04,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:04,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 07:11:04,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:04,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 07:11:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-09 07:11:04,065 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 07:11:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:04,475 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-11-09 07:11:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:11:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-11-09 07:11:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:04,479 INFO L225 Difference]: With dead ends: 50 [2024-11-09 07:11:04,482 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 07:11:04,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:11:04,484 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:04,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:11:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 07:11:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-09 07:11:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:11:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-09 07:11:04,505 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2024-11-09 07:11:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:04,505 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-09 07:11:04,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 07:11:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-09 07:11:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 07:11:04,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:04,507 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:04,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:11:04,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:04,712 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:04,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2034232297, now seen corresponding path program 1 times [2024-11-09 07:11:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:04,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387619236] [2024-11-09 07:11:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:04,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:11:04,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66234933] [2024-11-09 07:11:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:04,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:04,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:04,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:04,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:11:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:04,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:11:04,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:11:04,846 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:11:04,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387619236] [2024-11-09 07:11:04,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:11:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66234933] [2024-11-09 07:11:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66234933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:11:04,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:11:04,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:11:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808465321] [2024-11-09 07:11:04,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:11:04,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:11:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:11:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:11:04,852 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:11:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:04,901 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-11-09 07:11:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:11:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-11-09 07:11:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:04,903 INFO L225 Difference]: With dead ends: 55 [2024-11-09 07:11:04,903 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 07:11:04,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:11:04,904 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:04,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:11:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 07:11:04,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 07:11:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 07:11:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-09 07:11:04,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 26 [2024-11-09 07:11:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:04,923 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-09 07:11:04,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:11:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-09 07:11:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:11:04,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:04,926 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 07:11:04,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:11:05,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:05,127 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:05,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:05,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1638654767, now seen corresponding path program 2 times [2024-11-09 07:11:05,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:05,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245117267] [2024-11-09 07:11:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:05,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:11:05,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:05,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245117267] [2024-11-09 07:11:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245117267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129177690] [2024-11-09 07:11:05,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:11:05,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:05,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:05,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:11:05,580 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:11:05,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:11:05,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:11:05,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:05,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:11:05,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129177690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:05,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358947097] [2024-11-09 07:11:05,801 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 07:11:05,804 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:05,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:05,805 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:05,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:06,256 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2024-11-09 07:11:06,341 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:07,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1666#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:11:07,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:07,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:07,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-09 07:11:07,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843959619] [2024-11-09 07:11:07,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:07,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 07:11:07,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 07:11:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-09 07:11:07,182 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 07:11:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:07,436 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2024-11-09 07:11:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 07:11:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 39 [2024-11-09 07:11:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:07,438 INFO L225 Difference]: With dead ends: 99 [2024-11-09 07:11:07,438 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 07:11:07,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2024-11-09 07:11:07,440 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:07,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:11:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 07:11:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-09 07:11:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 07:11:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2024-11-09 07:11:07,459 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 39 [2024-11-09 07:11:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:07,459 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2024-11-09 07:11:07,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-09 07:11:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2024-11-09 07:11:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 07:11:07,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:07,463 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 07:11:07,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:11:07,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:07,668 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:07,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1817526391, now seen corresponding path program 3 times [2024-11-09 07:11:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:07,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551080811] [2024-11-09 07:11:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:07,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 07:11:08,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551080811] [2024-11-09 07:11:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551080811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712411781] [2024-11-09 07:11:08,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:11:08,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:08,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:08,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:08,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:11:20,423 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:11:20,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:11:20,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:11:20,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:20,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 07:11:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712411781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976000590] [2024-11-09 07:11:20,884 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 07:11:20,885 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:20,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:20,886 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:20,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:21,396 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2024-11-09 07:11:21,444 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:24,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2517#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:11:24,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:24,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:24,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 24 [2024-11-09 07:11:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567346567] [2024-11-09 07:11:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:24,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:11:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:24,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:11:24,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=794, Unknown=1, NotChecked=0, Total=1056 [2024-11-09 07:11:24,230 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 20 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 19 states have call predecessors, (29), 19 states have call successors, (29) [2024-11-09 07:11:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:25,027 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2024-11-09 07:11:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 07:11:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 20 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 19 states have call predecessors, (29), 19 states have call successors, (29) Word has length 87 [2024-11-09 07:11:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:25,030 INFO L225 Difference]: With dead ends: 179 [2024-11-09 07:11:25,030 INFO L226 Difference]: Without dead ends: 171 [2024-11-09 07:11:25,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=690, Invalid=1961, Unknown=1, NotChecked=0, Total=2652 [2024-11-09 07:11:25,032 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:25,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 111 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:11:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-09 07:11:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2024-11-09 07:11:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 127 states have (on average 1.015748031496063) internal successors, (129), 128 states have internal predecessors, (129), 22 states have call successors, (22), 21 states have call predecessors, (22), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 07:11:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2024-11-09 07:11:25,060 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 87 [2024-11-09 07:11:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:25,060 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2024-11-09 07:11:25,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 20 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 19 states have call predecessors, (29), 19 states have call successors, (29) [2024-11-09 07:11:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2024-11-09 07:11:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-09 07:11:25,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:25,064 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2024-11-09 07:11:25,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:11:25,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:25,265 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:25,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1097669615, now seen corresponding path program 4 times [2024-11-09 07:11:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425479391] [2024-11-09 07:11:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:11:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927739490] [2024-11-09 07:11:27,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:11:27,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:27,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:27,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:27,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:11:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 07:11:29,056 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 07:11:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 07:11:31,789 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 07:11:31,790 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 07:11:31,791 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 07:11:31,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:11:31,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:31,998 INFO L407 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:32,136 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 07:11:32,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 07:11:32 BoogieIcfgContainer [2024-11-09 07:11:32,146 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 07:11:32,147 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 07:11:32,148 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 07:11:32,148 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 07:11:32,149 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:50" (3/4) ... [2024-11-09 07:11:32,150 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 07:11:32,320 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 07:11:32,321 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 07:11:32,321 INFO L158 Benchmark]: Toolchain (without parser) took 42501.83ms. Allocated memory was 130.0MB in the beginning and 406.8MB in the end (delta: 276.8MB). Free memory was 94.4MB in the beginning and 360.7MB in the end (delta: -266.4MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2024-11-09 07:11:32,322 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:11:32,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.30ms. Allocated memory is still 130.0MB. Free memory was 93.9MB in the beginning and 81.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 07:11:32,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.94ms. Allocated memory is still 130.0MB. Free memory was 81.3MB in the beginning and 79.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:11:32,323 INFO L158 Benchmark]: Boogie Preprocessor took 31.33ms. Allocated memory is still 130.0MB. Free memory was 79.7MB in the beginning and 78.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:11:32,323 INFO L158 Benchmark]: RCFGBuilder took 605.33ms. Allocated memory is still 130.0MB. Free memory was 78.2MB in the beginning and 59.1MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-09 07:11:32,323 INFO L158 Benchmark]: TraceAbstraction took 41309.57ms. Allocated memory was 130.0MB in the beginning and 406.8MB in the end (delta: 276.8MB). Free memory was 58.7MB in the beginning and 369.1MB in the end (delta: -310.4MB). Peak memory consumption was 202.7MB. Max. memory is 16.1GB. [2024-11-09 07:11:32,323 INFO L158 Benchmark]: Witness Printer took 173.49ms. Allocated memory is still 406.8MB. Free memory was 369.1MB in the beginning and 360.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-09 07:11:32,326 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 130.0MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.30ms. Allocated memory is still 130.0MB. Free memory was 93.9MB in the beginning and 81.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.94ms. Allocated memory is still 130.0MB. Free memory was 81.3MB in the beginning and 79.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.33ms. Allocated memory is still 130.0MB. Free memory was 79.7MB in the beginning and 78.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 605.33ms. Allocated memory is still 130.0MB. Free memory was 78.2MB in the beginning and 59.1MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 41309.57ms. Allocated memory was 130.0MB in the beginning and 406.8MB in the end (delta: 276.8MB). Free memory was 58.7MB in the beginning and 369.1MB in the end (delta: -310.4MB). Peak memory consumption was 202.7MB. Max. memory is 16.1GB. * Witness Printer took 173.49ms. Allocated memory is still 406.8MB. Free memory was 369.1MB in the beginning and 360.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=24853, b=40983, counter=0, p=1, q=0, x=24853, y=40983] [L33] EXPR counter++ VAL [a=24853, b=40983, counter=1, p=1, q=0, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=24853, b=40983, counter=1, p=1, q=0, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=24852, b=40982, counter=1, p=1, q=65835, x=24853, y=40983] [L33] EXPR counter++ VAL [a=24852, b=40982, counter=2, p=1, q=65835, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=24852, b=40982, counter=2, p=1, q=65835, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=12426, b=20491, counter=2, p=4, q=65835, x=24853, y=40983] [L33] EXPR counter++ VAL [a=12426, b=20491, counter=3, p=4, q=65835, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=12426, b=20491, counter=3, p=4, q=65835, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND TRUE a % 2 == 0 && b % 2 == 1 [L47] b = b - 1 [L48] q = q + a * p VAL [a=12426, b=20490, counter=3, p=4, q=115539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=12426, b=20490, counter=4, p=4, q=115539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=12426, b=20490, counter=4, p=4, q=115539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=6213, b=10245, counter=4, p=16, q=115539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=6213, b=10245, counter=5, p=16, q=115539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=6213, b=10245, counter=5, p=16, q=115539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=6212, b=10244, counter=5, p=16, q=378851, x=24853, y=40983] [L33] EXPR counter++ VAL [a=6212, b=10244, counter=6, p=16, q=378851, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=6] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=6212, b=10244, counter=6, p=16, q=378851, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=3106, b=5122, counter=6, p=64, q=378851, x=24853, y=40983] [L33] EXPR counter++ VAL [a=3106, b=5122, counter=7, p=64, q=378851, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=3106, b=5122, counter=7, p=64, q=378851, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1553, b=2561, counter=7, p=256, q=378851, x=24853, y=40983] [L33] EXPR counter++ VAL [a=1553, b=2561, counter=8, p=256, q=378851, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=1553, b=2561, counter=8, p=256, q=378851, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=1552, b=2560, counter=8, p=256, q=1431779, x=24853, y=40983] [L33] EXPR counter++ VAL [a=1552, b=2560, counter=9, p=256, q=1431779, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=1552, b=2560, counter=9, p=256, q=1431779, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=776, b=1280, counter=9, p=1024, q=1431779, x=24853, y=40983] [L33] EXPR counter++ VAL [a=776, b=1280, counter=10, p=1024, q=1431779, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=776, b=1280, counter=10, p=1024, q=1431779, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=388, b=640, counter=10, p=4096, q=1431779, x=24853, y=40983] [L33] EXPR counter++ VAL [a=388, b=640, counter=11, p=4096, q=1431779, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=11] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=388, b=640, counter=11, p=4096, q=1431779, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=194, b=320, counter=11, p=16384, q=1431779, x=24853, y=40983] [L33] EXPR counter++ VAL [a=194, b=320, counter=12, p=16384, q=1431779, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=12] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=194, b=320, counter=12, p=16384, q=1431779, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=97, b=160, counter=12, p=65536, q=1431779, x=24853, y=40983] [L33] EXPR counter++ VAL [a=97, b=160, counter=13, p=65536, q=1431779, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=13] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=97, b=160, counter=13, p=65536, q=1431779, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p VAL [a=96, b=160, counter=13, p=65536, q=11917539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=96, b=160, counter=14, p=65536, q=11917539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=14] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=96, b=160, counter=14, p=65536, q=11917539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=48, b=80, counter=14, p=262144, q=11917539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=48, b=80, counter=15, p=262144, q=11917539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=15] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=48, b=80, counter=15, p=262144, q=11917539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=24, b=40, counter=15, p=1048576, q=11917539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=24, b=40, counter=16, p=1048576, q=11917539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=16] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=24, b=40, counter=16, p=1048576, q=11917539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=12, b=20, counter=16, p=4194304, q=11917539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=12, b=20, counter=17, p=4194304, q=11917539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=17] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=12, b=20, counter=17, p=4194304, q=11917539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=6, b=10, counter=17, p=16777216, q=11917539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=6, b=10, counter=18, p=16777216, q=11917539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=18] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=6, b=10, counter=18, p=16777216, q=11917539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=3, b=5, counter=18, p=67108864, q=11917539, x=24853, y=40983] [L33] EXPR counter++ VAL [a=3, b=5, counter=19, p=67108864, q=11917539, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=19] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=3, b=5, counter=19, p=67108864, q=11917539, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=2, b=4, counter=19, p=67108864, q=481679587, x=24853, y=40983] [L33] EXPR counter++ VAL [a=2, b=4, counter=20, p=67108864, q=481679587, x=24853, y=40983] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=20] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=4, counter=20, p=67108864, q=481679587, x=24853, y=40983] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1, b=2, counter=20, p=268435456, q=481679587, x=24853, y=40983] [L33] EXPR counter++ VAL [a=1, b=2, counter=21, p=268435456, q=481679587, x=24853, y=40983] [L33] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 41.1s, OverallIterations: 11, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 163 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 155 mSDsluCounter, 532 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 418 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 459 IncrementalHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 114 mSDtfsCounter, 459 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 656 GetRequests, 486 SyntacticMatches, 9 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=10, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 15.8s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 793 NumberOfCodeBlocks, 793 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 548 ConstructedInterpolants, 2 QuantifiedInterpolants, 1788 SizeOfPredicates, 36 NumberOfNonLiveVariables, 745 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 549/1464 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: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-09 07:11:32,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79283406-c909-4ee1-a8b5-8591cca0c391/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE