./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/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_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/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_541ce592-3590-4f19-9e92-25d4141183a5/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 36da946a83103a61b88f0f1db9af94484aad5eefbde5313f974f53b267bd14bf --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:10:03,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:10:03,774 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:10:03,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:10:03,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:10:03,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:10:03,802 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:10:03,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:10:03,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:10:03,803 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:10:03,804 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:10:03,804 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:10:03,805 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:10:03,805 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:10:03,805 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:10:03,806 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:10:03,806 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:10:03,806 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:10:03,807 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:10:03,807 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:10:03,808 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:10:03,808 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:10:03,809 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:10:03,809 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:10:03,810 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:10:03,810 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:10:03,810 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:10:03,811 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:10:03,811 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:10:03,811 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:10:03,812 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:10:03,812 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:10:03,812 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:10:03,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:10:03,813 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:10:03,813 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:10:03,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:10:03,814 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:10:03,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:10:03,814 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:10:03,815 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:10:03,815 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:10:03,816 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:10:03,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:10:03,816 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:10:03,816 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:10:03,817 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:10:03,817 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_541ce592-3590-4f19-9e92-25d4141183a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36da946a83103a61b88f0f1db9af94484aad5eefbde5313f974f53b267bd14bf [2024-11-09 07:10:04,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:10:04,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:10:04,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:10:04,187 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:10:04,187 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:10:04,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c Unable to find full path for "g++" [2024-11-09 07:10:06,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:10:06,549 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:10:06,551 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2024-11-09 07:10:06,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/data/7366495e6/ad9eb09292cf4f3fa074b16a0b5d7106/FLAG9fb515256 [2024-11-09 07:10:06,880 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/data/7366495e6/ad9eb09292cf4f3fa074b16a0b5d7106 [2024-11-09 07:10:06,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:10:06,885 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:10:06,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:10:06,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:10:06,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:10:06,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:10:06" (1/1) ... [2024-11-09 07:10:06,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ed19c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:06, skipping insertion in model container [2024-11-09 07:10:06,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:10:06" (1/1) ... [2024-11-09 07:10:06,918 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:10:07,122 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_541ce592-3590-4f19-9e92-25d4141183a5/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2024-11-09 07:10:07,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:10:07,155 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:10:07,165 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_541ce592-3590-4f19-9e92-25d4141183a5/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2024-11-09 07:10:07,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:10:07,194 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:10:07,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07 WrapperNode [2024-11-09 07:10:07,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:10:07,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:10:07,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:10:07,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:10:07,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,215 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,235 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-11-09 07:10:07,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:10:07,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:10:07,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:10:07,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:10:07,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,250 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,254 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:10:07,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:10:07,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:10:07,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:10:07,265 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (1/1) ... [2024-11-09 07:10:07,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:10:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:07,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:10:07,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:10:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:10:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 07:10:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 07:10:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:10:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:10:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:10:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 07:10:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 07:10:07,432 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:10:07,435 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:10:07,616 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 07:10:07,616 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:10:07,656 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:10:07,657 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 07:10:07,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:07 BoogieIcfgContainer [2024-11-09 07:10:07,658 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:10:07,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:10:07,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:10:07,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:10:07,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:10:06" (1/3) ... [2024-11-09 07:10:07,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2140e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:10:07, skipping insertion in model container [2024-11-09 07:10:07,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:07" (2/3) ... [2024-11-09 07:10:07,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2140e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:10:07, skipping insertion in model container [2024-11-09 07:10:07,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:07" (3/3) ... [2024-11-09 07:10:07,669 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2024-11-09 07:10:07,693 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:10:07,694 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:10:07,754 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:10:07,764 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;@261a0b1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:10:07,764 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:10:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:10:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:10:07,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:07,784 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:07,784 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:07,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 287051146, now seen corresponding path program 1 times [2024-11-09 07:10:07,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:07,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409970883] [2024-11-09 07:10:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:07,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:07,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409970883] [2024-11-09 07:10:07,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409970883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:07,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:07,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:10:07,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388821285] [2024-11-09 07:10:07,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:07,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 07:10:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 07:10:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 07:10:08,020 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:10:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:08,066 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2024-11-09 07:10:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 07:10:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-09 07:10:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:08,077 INFO L225 Difference]: With dead ends: 32 [2024-11-09 07:10:08,078 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 07:10:08,080 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 07:10:08,085 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:08,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 07:10:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 07:10:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 07:10:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-09 07:10:08,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2024-11-09 07:10:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:08,128 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-09 07:10:08,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:10:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-09 07:10:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 07:10:08,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:08,131 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:08,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:10:08,132 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:08,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash -279128393, now seen corresponding path program 1 times [2024-11-09 07:10:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:08,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940766560] [2024-11-09 07:10:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:08,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940766560] [2024-11-09 07:10:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940766560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:10:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295633077] [2024-11-09 07:10:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:08,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:08,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:08,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:08,404 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:10:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:08,456 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-09 07:10:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 07:10:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:08,458 INFO L225 Difference]: With dead ends: 26 [2024-11-09 07:10:08,459 INFO L226 Difference]: Without dead ends: 19 [2024-11-09 07:10:08,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 07:10:08,461 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:08,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-09 07:10:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-09 07:10:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 07:10:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-09 07:10:08,468 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2024-11-09 07:10:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:08,469 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-09 07:10:08,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:10:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-09 07:10:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 07:10:08,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:08,470 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:08,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:10:08,471 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:08,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash -277340933, now seen corresponding path program 1 times [2024-11-09 07:10:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:08,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101751736] [2024-11-09 07:10:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:10:08,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098176599] [2024-11-09 07:10:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:08,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:08,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:08,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:08,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:10:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:08,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:10:08,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:08,993 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:10:08,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:08,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101751736] [2024-11-09 07:10:08,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:10:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098176599] [2024-11-09 07:10:08,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098176599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:08,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:08,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:10:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132839133] [2024-11-09 07:10:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:08,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:08,999 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:10:10,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:10:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:10,750 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-09 07:10:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 07:10:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:10,752 INFO L225 Difference]: With dead ends: 27 [2024-11-09 07:10:10,753 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 07:10:10,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 07:10:10,754 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:10,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 07:10:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 07:10:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-09 07:10:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:10:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 07:10:10,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2024-11-09 07:10:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:10,771 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 07:10:10,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:10:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 07:10:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 07:10:10,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:10,773 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:10,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:10:10,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:10,978 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:10,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash -144982397, now seen corresponding path program 1 times [2024-11-09 07:10:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105419987] [2024-11-09 07:10:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:11,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105419987] [2024-11-09 07:10:11,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105419987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709749480] [2024-11-09 07:10:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:11,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:11,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:11,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:11,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:10:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:11,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 07:10:11,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:11,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:11,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709749480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:11,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754043523] [2024-11-09 07:10:11,760 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:10:11,760 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:11,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:11,774 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:11,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:12,853 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-09 07:10:14,450 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 07:10:14,499 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:32,250 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~counter~0 1)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse2 (= |c___VERIFIER_assert_#in~cond| 1))) (and (or (and .cse0 .cse1) (and .cse0 .cse1 .cse2)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (let ((.cse17 (select |c_#memory_int| 1))) (let ((.cse3 (= (select |c_#valid| 0) 0)) (.cse4 (= (select |c_#valid| 3) 1)) (.cse5 (= 2 (select |c_#length| 1))) (.cse6 (= (select |c_#valid| 1) 1)) (.cse7 (= (select |c_#valid| 2) 1)) (.cse8 (= (select .cse17 1) 0)) (.cse12 (= (select |c_#length| 3) 12)) (.cse13 (= 48 (select .cse17 0))) (.cse14 (= (select |c_#length| 2) 13))) (or (and .cse3 .cse4 .cse0 .cse5 .cse6 .cse1 .cse7 .cse8 (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7| Int)) (let ((.cse11 (div (+ (* (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|) 1) 2))) (let ((.cse9 (* .cse11 .cse11))) (and (= (mod (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| .cse9) 2) 1) (let ((.cse10 (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|) 1) (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|) (* .cse9 4))))) (or (and (not .cse10) (= |c___VERIFIER_assert_#in~cond| 0)) (and .cse10 .cse2))) (<= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| .cse9) (<= 0 (+ 2147483647 .cse11)) (<= .cse11 2147483648) (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7| 1) 2) 0) (<= .cse9 (+ 2147483647 |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5|)) (<= (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| 3) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|))))) .cse12 .cse13 .cse14) (and .cse3 .cse4 .cse0 .cse5 (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6| Int)) (let ((.cse16 (div (+ (* (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) 1) 2))) (let ((.cse15 (* .cse16 .cse16))) (and (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6| 1) 2) 0) (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) 1) (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) (* 4 .cse15))) (= (mod .cse15 2) 1) (<= .cse15 2147483647) (<= 3 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) (<= .cse16 2147483648) (<= 0 .cse15) (<= 0 (+ .cse16 2147483647)))))) .cse6 .cse1 .cse7 .cse8 .cse12 .cse13 .cse2 .cse14)))))) is different from false [2024-11-09 07:10:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1754043523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:49,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:49,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 8, 8] total 24 [2024-11-09 07:10:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859167155] [2024-11-09 07:10:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:49,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:10:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:10:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=429, Unknown=7, NotChecked=42, Total=552 [2024-11-09 07:10:49,440 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 07:10:51,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 07:10:53,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:10:55,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:11:00,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 07:11:02,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:11:04,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:11:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:04,284 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-09 07:11:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:11:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) Word has length 20 [2024-11-09 07:11:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:04,285 INFO L225 Difference]: With dead ends: 32 [2024-11-09 07:11:04,286 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 07:11:04,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=85, Invalid=464, Unknown=7, NotChecked=44, Total=600 [2024-11-09 07:11:04,287 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:04,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 4 Unknown, 23 Unchecked, 12.0s Time] [2024-11-09 07:11:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 07:11:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 07:11:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:11:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-09 07:11:04,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2024-11-09 07:11:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:04,298 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-09 07:11:04,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 07:11:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-09 07:11:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:11:04,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:04,299 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:04,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:11:04,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:04,500 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:04,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 568038870, now seen corresponding path program 1 times [2024-11-09 07:11:04,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:04,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054076586] [2024-11-09 07:11:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:04,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:11:04,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054076586] [2024-11-09 07:11:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054076586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844100488] [2024-11-09 07:11:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:04,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:04,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:04,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:11:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:04,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 07:11:04,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:11:04,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:11:05,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844100488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758945025] [2024-11-09 07:11:05,023 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:11:05,023 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:05,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:05,023 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:05,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:06,606 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 58 for LOIs [2024-11-09 07:11:06,704 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2024-11-09 07:11:06,735 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:15,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '655#(and (= |__VERIFIER_assert_#in~cond| 0) (or (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27|) (not (= (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_14| 4) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27| 4)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17|)))))) (and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26|) (not (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16| 2)) (+ (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16|) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16|)))) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26| 2147483647))))))' at error location [2024-11-09 07:11:15,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:15,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:15,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-09 07:11:15,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55874250] [2024-11-09 07:11:15,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:15,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 07:11:15,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:15,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 07:11:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=411, Unknown=2, NotChecked=0, Total=506 [2024-11-09 07:11:15,006 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-09 07:11:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:15,213 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-11-09 07:11:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:11:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 22 [2024-11-09 07:11:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:15,215 INFO L225 Difference]: With dead ends: 56 [2024-11-09 07:11:15,215 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 07:11:15,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=106, Invalid=492, Unknown=2, NotChecked=0, Total=600 [2024-11-09 07:11:15,216 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:15,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:11:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 07:11:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-09 07:11:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:11:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-09 07:11:15,232 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 22 [2024-11-09 07:11:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:15,232 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-09 07:11:15,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-09 07:11:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-09 07:11:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:11:15,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:15,233 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:15,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:11:15,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:15,435 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:15,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash 569826330, now seen corresponding path program 1 times [2024-11-09 07:11:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752979412] [2024-11-09 07:11:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:11:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207282557] [2024-11-09 07:11:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:15,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:15,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:15,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:11:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:15,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:11:15,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:11:23,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:11:25,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752979412] [2024-11-09 07:11:25,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:11:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207282557] [2024-11-09 07:11:25,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207282557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652595930] [2024-11-09 07:11:25,543 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:11:25,544 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:25,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:25,544 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:25,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:26,998 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2024-11-09 07:11:27,045 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2024-11-09 07:11:27,077 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:39,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '963#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_26| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_47| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_47|) (not (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_26| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29|) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_47| 4)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29|)))) (<= 1 ~counter~0))))' at error location [2024-11-09 07:11:39,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:39,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:11:39,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13 [2024-11-09 07:11:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914275801] [2024-11-09 07:11:39,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:39,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:11:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:11:39,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=570, Unknown=4, NotChecked=0, Total=650 [2024-11-09 07:11:39,315 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:11:41,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:11:43,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:11:44,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:11:46,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:11:47,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 07:11:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:47,593 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2024-11-09 07:11:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:11:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 22 [2024-11-09 07:11:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:47,594 INFO L225 Difference]: With dead ends: 60 [2024-11-09 07:11:47,594 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 07:11:47,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=83, Invalid=615, Unknown=4, NotChecked=0, Total=702 [2024-11-09 07:11:47,596 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:47,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2024-11-09 07:11:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 07:11:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2024-11-09 07:11:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:11:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-11-09 07:11:47,611 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 22 [2024-11-09 07:11:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:47,612 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-11-09 07:11:47,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:11:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-11-09 07:11:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 07:11:47,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:47,613 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:47,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:11:47,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:47,814 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:11:47,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash 24144482, now seen corresponding path program 1 times [2024-11-09 07:11:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:47,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378216925] [2024-11-09 07:11:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:47,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:11:48,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378216925] [2024-11-09 07:11:48,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378216925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825491017] [2024-11-09 07:11:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:48,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:48,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:48,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:11:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:48,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 07:11:48,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:11:48,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:11:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825491017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681268496] [2024-11-09 07:11:48,435 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:11:48,435 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:48,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:48,436 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:48,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:49,506 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2024-11-09 07:11:49,548 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 07:11:49,569 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:04,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1310#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_65| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_65|) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_65| 2147483647) (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41|)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_36| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_65| 4)))))))' at error location [2024-11-09 07:12:04,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:04,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-11-09 07:12:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173189109] [2024-11-09 07:12:04,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:04,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:12:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:12:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=521, Unknown=4, NotChecked=0, Total=600 [2024-11-09 07:12:04,988 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-09 07:12:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:05,329 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2024-11-09 07:12:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:12:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2024-11-09 07:12:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:05,331 INFO L225 Difference]: With dead ends: 50 [2024-11-09 07:12:05,331 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 07:12:05,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=83, Invalid=563, Unknown=4, NotChecked=0, Total=650 [2024-11-09 07:12:05,333 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:05,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:12:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 07:12:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-09 07:12:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:12:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-09 07:12:05,348 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 28 [2024-11-09 07:12:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:05,348 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-09 07:12:05,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-09 07:12:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-09 07:12:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 07:12:05,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:05,352 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:05,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:12:05,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:05,553 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:12:05,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:05,553 INFO L85 PathProgramCache]: Analyzing trace with hash 351435059, now seen corresponding path program 2 times [2024-11-09 07:12:05,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:05,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141837335] [2024-11-09 07:12:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:12:05,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:05,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141837335] [2024-11-09 07:12:05,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141837335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:05,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794686356] [2024-11-09 07:12:05,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:12:05,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:05,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:05,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:12:05,899 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:12:05,899 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:12:05,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:12:05,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:12:06,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:12:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794686356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899468172] [2024-11-09 07:12:06,442 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:12:06,442 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:06,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:06,443 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:06,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:07,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 58 for LOIs [2024-11-09 07:12:07,493 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 07:12:07,513 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:19,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1755#(and (or (and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_50| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_50| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_80| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_80| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_80|) (not (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_50|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_50| 2)) (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_50|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_50|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_80| 4))))))) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_51| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_81| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_51| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_81|) (<= 1 ~counter~0) (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_51| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_51|)) (+ (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_81| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_51|) (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_45| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_51|)))) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_81| 2147483647)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:12:19,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:19,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:19,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-09 07:12:19,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108414530] [2024-11-09 07:12:19,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:19,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 07:12:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 07:12:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=623, Unknown=3, NotChecked=0, Total=812 [2024-11-09 07:12:19,439 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 12 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-09 07:12:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:20,074 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2024-11-09 07:12:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 07:12:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 12 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) Word has length 46 [2024-11-09 07:12:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:20,078 INFO L225 Difference]: With dead ends: 98 [2024-11-09 07:12:20,078 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 07:12:20,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=286, Invalid=1043, Unknown=3, NotChecked=0, Total=1332 [2024-11-09 07:12:20,079 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:20,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:12:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 07:12:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-09 07:12:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 07:12:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2024-11-09 07:12:20,111 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 46 [2024-11-09 07:12:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:20,112 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2024-11-09 07:12:20,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 12 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-09 07:12:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2024-11-09 07:12:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 07:12:20,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:20,118 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:20,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:12:20,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:20,319 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:12:20,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2021774611, now seen corresponding path program 3 times [2024-11-09 07:12:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:20,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951677713] [2024-11-09 07:12:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-09 07:12:21,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:21,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951677713] [2024-11-09 07:12:21,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951677713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:21,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160860153] [2024-11-09 07:12:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:12:21,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:21,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:21,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:12:21,345 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:12:21,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:12:21,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:12:21,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:12:21,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-09 07:12:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160860153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:22,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395852132] [2024-11-09 07:12:22,767 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:12:22,767 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:22,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:22,767 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:22,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:23,642 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 58 for LOIs [2024-11-09 07:12:23,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2024-11-09 07:12:23,731 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:33,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2657#(and (or (and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_60| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_60| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_96| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_96| 2147483647) (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_60| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_60| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_60|)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_60| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_60|) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_60|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_96| 4)))) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_96|))) (<= 1 ~counter~0)) (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_54| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_97| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_97| 2147483647) (<= 1 ~counter~0) (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_61| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_61| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_61|)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_61| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_61|) (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_54| 4) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_97| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_61|)))) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_97|)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:12:33,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:33,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 28 [2024-11-09 07:12:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816772274] [2024-11-09 07:12:33,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:33,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:12:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:12:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1157, Unknown=2, NotChecked=0, Total=1640 [2024-11-09 07:12:33,919 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 24 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 23 states have call predecessors, (36), 23 states have call successors, (36) [2024-11-09 07:12:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:35,822 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2024-11-09 07:12:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-09 07:12:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 24 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 23 states have call predecessors, (36), 23 states have call successors, (36) Word has length 94 [2024-11-09 07:12:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:35,825 INFO L225 Difference]: With dead ends: 194 [2024-11-09 07:12:35,826 INFO L226 Difference]: Without dead ends: 189 [2024-11-09 07:12:35,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=971, Invalid=2687, Unknown=2, NotChecked=0, Total=3660 [2024-11-09 07:12:35,828 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:35,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 128 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:12:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-09 07:12:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2024-11-09 07:12:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 25 states have call successors, (25), 24 states have call predecessors, (25), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 07:12:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2024-11-09 07:12:35,863 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 94 [2024-11-09 07:12:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:35,864 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2024-11-09 07:12:35,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 24 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 23 states have call predecessors, (36), 23 states have call successors, (36) [2024-11-09 07:12:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2024-11-09 07:12:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-09 07:12:35,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:35,868 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:35,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 07:12:36,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:36,069 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:12:36,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1780038241, now seen corresponding path program 4 times [2024-11-09 07:12:36,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:36,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089738827] [2024-11-09 07:12:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:36,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2024-11-09 07:12:38,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:38,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089738827] [2024-11-09 07:12:38,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089738827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:38,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858435638] [2024-11-09 07:12:38,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:12:38,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:38,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:38,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:38,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:12:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:38,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 07:12:38,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:12:39,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2024-11-09 07:12:43,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858435638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523884280] [2024-11-09 07:12:43,562 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:12:43,563 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:43,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:43,563 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:43,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:44,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 58 for LOIs [2024-11-09 07:12:44,829 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 07:12:44,858 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:56,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4471#(and (or (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_113| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_63| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_113|) (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_71| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_71| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_71|)) (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_63| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_71|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_113| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_71| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_71|)))) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_113| 2147483647))) (and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_70| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_112| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_70| Int)) (and (not (= (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_70|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_112| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_70| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_70|)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_70| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_70| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_70|)))) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_112| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_112|))) (<= 1 ~counter~0))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:12:56,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:56,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:56,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 26] total 52 [2024-11-09 07:12:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894148927] [2024-11-09 07:12:56,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:56,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 07:12:56,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 07:12:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=2658, Unknown=2, NotChecked=0, Total=4160 [2024-11-09 07:12:56,656 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 52 states have internal predecessors, (218), 48 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 47 states have call predecessors, (72), 47 states have call successors, (72) [2024-11-09 07:13:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:13:03,026 INFO L93 Difference]: Finished difference Result 386 states and 410 transitions. [2024-11-09 07:13:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-09 07:13:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 52 states have internal predecessors, (218), 48 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 47 states have call predecessors, (72), 47 states have call successors, (72) Word has length 190 [2024-11-09 07:13:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:13:03,039 INFO L225 Difference]: With dead ends: 386 [2024-11-09 07:13:03,039 INFO L226 Difference]: Without dead ends: 381 [2024-11-09 07:13:03,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=3634, Invalid=8136, Unknown=2, NotChecked=0, Total=11772 [2024-11-09 07:13:03,044 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 236 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:13:03,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 191 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:13:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-11-09 07:13:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2024-11-09 07:13:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 states have internal predecessors, (285), 49 states have call successors, (49), 48 states have call predecessors, (49), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 07:13:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 382 transitions. [2024-11-09 07:13:03,116 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 382 transitions. Word has length 190 [2024-11-09 07:13:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:13:03,117 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 382 transitions. [2024-11-09 07:13:03,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 52 states have internal predecessors, (218), 48 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 47 states have call predecessors, (72), 47 states have call successors, (72) [2024-11-09 07:13:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 382 transitions. [2024-11-09 07:13:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2024-11-09 07:13:03,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:13:03,131 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:13:03,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:13:03,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:03,336 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:13:03,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:13:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -843183799, now seen corresponding path program 5 times [2024-11-09 07:13:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:13:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558648475] [2024-11-09 07:13:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:13:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:13:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4142 trivial. 0 not checked. [2024-11-09 07:13:13,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:13:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558648475] [2024-11-09 07:13:13,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558648475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:13:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111446393] [2024-11-09 07:13:13,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:13:13,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:13,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:13:13,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:13:13,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_541ce592-3590-4f19-9e92-25d4141183a5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process