./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/cohendiv-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/cohendiv-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2 --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 601ddeb38cc85433f6271611bfd2617c2fcbf2b89119dbe2c319aedc14aa3b17 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:39:25,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:39:25,961 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:39:25,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:39:25,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:39:26,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:39:26,006 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:39:26,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:39:26,008 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:39:26,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:39:26,010 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:39:26,010 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:39:26,011 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:39:26,011 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:39:26,011 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:39:26,011 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:39:26,012 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:39:26,012 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:39:26,012 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:39:26,013 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:39:26,016 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:39:26,020 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:39:26,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:39:26,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:39:26,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:39:26,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:39:26,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:39:26,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:39:26,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:39:26,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:39:26,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:39:26,023 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:39:26,023 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:39:26,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:39:26,025 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:39:26,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:39:26,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:39:26,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:39:26,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:39:26,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:39:26,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:39:26,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:39:26,029 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:39:26,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:39:26,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:39:26,030 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:39:26,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:39:26,030 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_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 601ddeb38cc85433f6271611bfd2617c2fcbf2b89119dbe2c319aedc14aa3b17 [2024-11-02 12:39:26,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:39:26,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:39:26,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:39:26,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:39:26,389 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:39:26,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/nla-digbench/cohendiv-ll.c Unable to find full path for "g++" [2024-11-02 12:39:28,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:39:28,594 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:39:28,594 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/sv-benchmarks/c/nla-digbench/cohendiv-ll.c [2024-11-02 12:39:28,600 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/data/1771fc977/19578e2d047a446dbd482cec3254e447/FLAGf7d2bfa3c [2024-11-02 12:39:28,614 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/data/1771fc977/19578e2d047a446dbd482cec3254e447 [2024-11-02 12:39:28,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:39:28,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:39:28,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:39:28,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:39:28,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:39:28,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:39:28" (1/1) ... [2024-11-02 12:39:28,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9ccf67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:28, skipping insertion in model container [2024-11-02 12:39:28,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:39:28" (1/1) ... [2024-11-02 12:39:28,665 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:39:28,944 WARN L251 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_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/sv-benchmarks/c/nla-digbench/cohendiv-ll.c[576,589] [2024-11-02 12:39:28,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:39:28,981 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:39:28,995 WARN L251 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_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/sv-benchmarks/c/nla-digbench/cohendiv-ll.c[576,589] [2024-11-02 12:39:29,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:39:29,030 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:39:29,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29 WrapperNode [2024-11-02 12:39:29,031 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:39:29,032 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:39:29,032 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:39:29,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:39:29,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,067 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-02 12:39:29,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:39:29,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:39:29,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:39:29,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:39:29,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:39:29,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:39:29,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:39:29,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:39:29,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (1/1) ... [2024-11-02 12:39:29,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:39:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:29,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:39:29,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:39:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:39:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:39:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:39:29,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:39:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 12:39:29,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 12:39:29,265 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:39:29,268 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:39:29,485 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-02 12:39:29,485 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:39:29,559 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:39:29,561 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:39:29,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:29 BoogieIcfgContainer [2024-11-02 12:39:29,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:39:29,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:39:29,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:39:29,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:39:29,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:39:28" (1/3) ... [2024-11-02 12:39:29,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da8f47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:39:29, skipping insertion in model container [2024-11-02 12:39:29,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:29" (2/3) ... [2024-11-02 12:39:29,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da8f47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:39:29, skipping insertion in model container [2024-11-02 12:39:29,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:29" (3/3) ... [2024-11-02 12:39:29,576 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll.c [2024-11-02 12:39:29,597 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:39:29,597 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:39:29,677 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:39:29,689 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;@4a9790a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:39:29,690 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:39:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-02 12:39:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:39:29,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:29,704 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:39:29,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:29,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash -840763311, now seen corresponding path program 1 times [2024-11-02 12:39:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:29,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027197684] [2024-11-02 12:39:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:39:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67438601] [2024-11-02 12:39:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:29,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:29,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:29,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:39:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:29,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:39:29,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:39:30,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:39:30,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:30,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027197684] [2024-11-02 12:39:30,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:39:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67438601] [2024-11-02 12:39:30,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67438601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:30,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:39:30,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:39:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034464659] [2024-11-02 12:39:30,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:30,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:39:30,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:39:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:39:30,162 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:30,307 INFO L93 Difference]: Finished difference Result 53 states and 88 transitions. [2024-11-02 12:39:30,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:39:30,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:39:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:30,340 INFO L225 Difference]: With dead ends: 53 [2024-11-02 12:39:30,340 INFO L226 Difference]: Without dead ends: 29 [2024-11-02 12:39:30,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:39:30,354 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:30,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-02 12:39:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-02 12:39:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-02 12:39:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-02 12:39:30,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 6 [2024-11-02 12:39:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:30,423 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-02 12:39:30,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-02 12:39:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 12:39:30,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:30,426 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:30,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:39:30,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-02 12:39:30,628 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:30,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1617230569, now seen corresponding path program 1 times [2024-11-02 12:39:30,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:30,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385871578] [2024-11-02 12:39:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:30,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:39:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560206354] [2024-11-02 12:39:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:30,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:30,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:30,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:30,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:39:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:30,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:39:30,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:39:30,789 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:39:30,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:30,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385871578] [2024-11-02 12:39:30,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:39:30,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560206354] [2024-11-02 12:39:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560206354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:30,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:39:30,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:39:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74285222] [2024-11-02 12:39:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:30,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:39:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:39:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:39:30,794 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:39:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:30,908 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2024-11-02 12:39:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:39:30,909 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-02 12:39:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:30,911 INFO L225 Difference]: With dead ends: 43 [2024-11-02 12:39:30,911 INFO L226 Difference]: Without dead ends: 40 [2024-11-02 12:39:30,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:39:30,914 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:30,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-02 12:39:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-02 12:39:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-02 12:39:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-11-02 12:39:30,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 11 [2024-11-02 12:39:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:30,938 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-11-02 12:39:30,938 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:39:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-11-02 12:39:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:39:30,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:30,940 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:30,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:39:31,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:31,144 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:31,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1579152954, now seen corresponding path program 1 times [2024-11-02 12:39:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:31,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065118606] [2024-11-02 12:39:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:31,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:39:31,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211428859] [2024-11-02 12:39:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:31,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:31,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:31,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:39:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:31,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:39:31,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:39:31,282 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:39:31,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065118606] [2024-11-02 12:39:31,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:39:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211428859] [2024-11-02 12:39:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211428859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:31,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:39:31,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:39:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653808697] [2024-11-02 12:39:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:31,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:39:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:39:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:39:31,286 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-02 12:39:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:31,384 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-11-02 12:39:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:39:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2024-11-02 12:39:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:31,387 INFO L225 Difference]: With dead ends: 65 [2024-11-02 12:39:31,387 INFO L226 Difference]: Without dead ends: 63 [2024-11-02 12:39:31,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:39:31,389 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:31,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-02 12:39:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-11-02 12:39:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-02 12:39:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2024-11-02 12:39:31,408 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 18 [2024-11-02 12:39:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:31,409 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2024-11-02 12:39:31,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-02 12:39:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2024-11-02 12:39:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 12:39:31,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:31,410 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:31,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:39:31,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:31,612 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:31,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1664152134, now seen corresponding path program 1 times [2024-11-02 12:39:31,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:31,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686196210] [2024-11-02 12:39:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:31,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 12:39:31,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:31,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686196210] [2024-11-02 12:39:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686196210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:31,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:39:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:39:31,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363036470] [2024-11-02 12:39:31,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:31,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:39:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:31,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:39:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:39:31,999 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 12:39:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:32,092 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-11-02 12:39:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:39:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-11-02 12:39:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:32,096 INFO L225 Difference]: With dead ends: 62 [2024-11-02 12:39:32,098 INFO L226 Difference]: Without dead ends: 60 [2024-11-02 12:39:32,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:39:32,100 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:32,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-02 12:39:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-02 12:39:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-02 12:39:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2024-11-02 12:39:32,126 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 28 [2024-11-02 12:39:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:32,126 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2024-11-02 12:39:32,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 12:39:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2024-11-02 12:39:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 12:39:32,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:32,131 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:32,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:39:32,132 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:32,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash 999733316, now seen corresponding path program 1 times [2024-11-02 12:39:32,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:32,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567502119] [2024-11-02 12:39:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-02 12:39:32,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567502119] [2024-11-02 12:39:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567502119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:32,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634823722] [2024-11-02 12:39:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:32,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:32,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:39:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:32,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:39:32,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-02 12:39:32,625 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:39:32,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634823722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:32,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:39:32,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-02 12:39:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318895965] [2024-11-02 12:39:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:32,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:39:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:39:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:39:32,630 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:39:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:32,782 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2024-11-02 12:39:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:39:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-11-02 12:39:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:32,788 INFO L225 Difference]: With dead ends: 73 [2024-11-02 12:39:32,789 INFO L226 Difference]: Without dead ends: 71 [2024-11-02 12:39:32,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:39:32,790 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:32,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-02 12:39:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2024-11-02 12:39:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 41 states have internal predecessors, (43), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-02 12:39:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2024-11-02 12:39:32,808 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 34 [2024-11-02 12:39:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:32,808 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2024-11-02 12:39:32,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:39:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2024-11-02 12:39:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-02 12:39:32,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:32,810 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:32,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:39:33,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:33,015 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:33,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:33,015 INFO L85 PathProgramCache]: Analyzing trace with hash -439479252, now seen corresponding path program 1 times [2024-11-02 12:39:33,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:33,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614145152] [2024-11-02 12:39:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 12:39:33,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591020993] [2024-11-02 12:39:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:33,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:33,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:39:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:33,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 12:39:33,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 12:39:33,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 12:39:33,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:33,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614145152] [2024-11-02 12:39:33,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 12:39:33,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591020993] [2024-11-02 12:39:33,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591020993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680136644] [2024-11-02 12:39:33,809 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-02 12:39:33,810 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:33,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:33,820 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:33,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:38,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-02 12:39:38,539 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:39,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1388#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-02 12:39:39,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:39,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:39:39,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-02 12:39:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430126521] [2024-11-02 12:39:39,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:39,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 12:39:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 12:39:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-11-02 12:39:39,727 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-02 12:39:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:40,138 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2024-11-02 12:39:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:39:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2024-11-02 12:39:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:40,140 INFO L225 Difference]: With dead ends: 99 [2024-11-02 12:39:40,141 INFO L226 Difference]: Without dead ends: 95 [2024-11-02 12:39:40,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:39:40,142 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:40,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 126 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:39:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-02 12:39:40,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2024-11-02 12:39:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 55 states have internal predecessors, (58), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 27 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-02 12:39:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2024-11-02 12:39:40,169 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 41 [2024-11-02 12:39:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:40,169 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2024-11-02 12:39:40,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-02 12:39:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2024-11-02 12:39:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-02 12:39:40,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:40,171 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:40,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:39:40,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:40,376 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:40,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1640482910, now seen corresponding path program 1 times [2024-11-02 12:39:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082449732] [2024-11-02 12:39:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-02 12:39:40,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082449732] [2024-11-02 12:39:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082449732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288548925] [2024-11-02 12:39:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:40,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:40,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:40,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:40,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:39:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:40,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-02 12:39:40,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 48 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-02 12:39:41,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-02 12:39:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288548925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475202859] [2024-11-02 12:39:41,349 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-02 12:39:41,353 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:41,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:41,354 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:41,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:44,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-02 12:39:44,007 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:44,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2062#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-02 12:39:44,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 17 [2024-11-02 12:39:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117496493] [2024-11-02 12:39:44,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:44,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 12:39:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 12:39:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-11-02 12:39:44,711 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-02 12:39:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:45,073 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2024-11-02 12:39:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:39:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 57 [2024-11-02 12:39:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:45,075 INFO L225 Difference]: With dead ends: 98 [2024-11-02 12:39:45,076 INFO L226 Difference]: Without dead ends: 0 [2024-11-02 12:39:45,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:39:45,078 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:45,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:39:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-02 12:39:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-02 12:39:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-02 12:39:45,080 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2024-11-02 12:39:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:45,080 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-02 12:39:45,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-02 12:39:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-02 12:39:45,081 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-02 12:39:45,084 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-02 12:39:45,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:39:45,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:39:45,292 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:45,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-02 12:39:46,267 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 12:39:46,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 12:39:46 BoogieIcfgContainer [2024-11-02 12:39:46,297 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 12:39:46,298 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 12:39:46,298 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 12:39:46,299 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 12:39:46,299 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:29" (3/4) ... [2024-11-02 12:39:46,302 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-02 12:39:46,307 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-02 12:39:46,316 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-02 12:39:46,316 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-02 12:39:46,316 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-02 12:39:46,317 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-02 12:39:46,441 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/witness.graphml [2024-11-02 12:39:46,442 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/witness.yml [2024-11-02 12:39:46,443 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 12:39:46,444 INFO L158 Benchmark]: Toolchain (without parser) took 17824.20ms. Allocated memory was 140.5MB in the beginning and 388.0MB in the end (delta: 247.5MB). Free memory was 102.3MB in the beginning and 202.6MB in the end (delta: -100.3MB). Peak memory consumption was 149.1MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,444 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 140.5MB. Free memory was 110.1MB in the beginning and 109.9MB in the end (delta: 184.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:39:46,445 INFO L158 Benchmark]: CACSL2BoogieTranslator took 410.38ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 89.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,445 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.74ms. Allocated memory is still 140.5MB. Free memory was 89.5MB in the beginning and 88.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,446 INFO L158 Benchmark]: Boogie Preprocessor took 26.27ms. Allocated memory is still 140.5MB. Free memory was 88.1MB in the beginning and 87.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,446 INFO L158 Benchmark]: RCFGBuilder took 462.07ms. Allocated memory is still 140.5MB. Free memory was 86.5MB in the beginning and 73.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,447 INFO L158 Benchmark]: TraceAbstraction took 16733.74ms. Allocated memory was 140.5MB in the beginning and 388.0MB in the end (delta: 247.5MB). Free memory was 73.0MB in the beginning and 207.8MB in the end (delta: -134.9MB). Peak memory consumption was 115.5MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,448 INFO L158 Benchmark]: Witness Printer took 144.58ms. Allocated memory is still 388.0MB. Free memory was 207.8MB in the beginning and 202.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-02 12:39:46,450 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 140.5MB. Free memory was 110.1MB in the beginning and 109.9MB in the end (delta: 184.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 410.38ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 89.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.74ms. Allocated memory is still 140.5MB. Free memory was 89.5MB in the beginning and 88.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.27ms. Allocated memory is still 140.5MB. Free memory was 88.1MB in the beginning and 87.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 462.07ms. Allocated memory is still 140.5MB. Free memory was 86.5MB in the beginning and 73.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16733.74ms. Allocated memory was 140.5MB in the beginning and 388.0MB in the end (delta: 247.5MB). Free memory was 73.0MB in the beginning and 207.8MB in the end (delta: -134.9MB). Peak memory consumption was 115.5MB. Max. memory is 16.1GB. * Witness Printer took 144.58ms. Allocated memory is still 388.0MB. Free memory was 207.8MB in the beginning and 202.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.6s, OverallIterations: 7, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 105 mSDsluCounter, 653 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 501 mSDsCounter, 120 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 589 IncrementalHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 120 mSolverCounterUnsat, 152 mSDtfsCounter, 589 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 398 GetRequests, 308 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=6, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 362 NumberOfCodeBlocks, 362 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 373 ConstructedInterpolants, 0 QuantifiedInterpolants, 1157 SizeOfPredicates, 11 NumberOfNonLiveVariables, 509 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 746/796 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((((((1 <= y) && (b == y)) && (a == 1)) && (1 <= r)) && ((((__int128) r + y) + ((__int128) q * y)) == ((__int128) b + x))) || (((((((long long) 2 * y) <= b) && (x == (r + ((__int128) q * y)))) && (1 <= y)) && (1 <= r)) && (((__int128) b + x) == ((((__int128) a * y) + r) + ((__int128) q * y))))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((1 <= y) && (b == 0)) && (r == x)) && (q == 0)) && (a == 0)) || ((((x == (r + ((__int128) q * y))) && (1 <= y)) && (y <= b)) && (((__int128) b + x) == ((((__int128) a * y) + r) + ((__int128) q * y))))) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-11-02 12:39:46,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcb8571-5ba3-4642-8aaa-fe1f87b714e0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE