./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --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 d6c389695f28ab23288d12eab23e55426fe9ec0f0b8fe9723cca18e00c3db8b7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:50:52,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:50:52,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:50:52,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:50:52,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:50:52,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:50:52,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:50:52,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:50:52,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:50:52,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:50:52,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:50:52,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:50:52,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:50:52,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:50:52,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:50:52,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:50:52,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:50:52,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:50:52,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:50:52,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:50:52,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:50:52,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:50:52,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:50:52,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:50:52,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:50:52,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:50:52,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:50:52,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:50:52,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:50:52,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:50:52,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:50:52,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:50:52,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:50:52,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:50:52,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:50:52,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:50:52,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:50:52,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:50:52,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:50:52,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:50:52,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:50:52,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:50:52,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:50:52,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:50:52,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:50:52,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:50:52,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:50:52,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:50:52,417 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:50:52,417 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:50:52,417 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:50:52,417 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:50:52,418 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:50:52,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:50:52,419 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:50:52,419 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:50:52,419 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:50:52,419 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:50:52,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:50:52,420 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:50:52,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:50:52,420 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:50:52,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:50:52,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:50:52,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:50:52,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:50:52,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:50:52,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:50:52,423 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:50:52,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:50:52,423 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:50:52,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:50:52,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:50:52,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:50:52,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:50:52,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:50:52,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:50:52,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:50:52,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:50:52,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:50:52,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:50:52,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:50:52,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:50:52,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6c389695f28ab23288d12eab23e55426fe9ec0f0b8fe9723cca18e00c3db8b7 [2022-11-03 01:50:52,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:50:52,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:50:52,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:50:52,787 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:50:52,788 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:50:52,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2022-11-03 01:50:52,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/data/37b2499bc/9df84ca35da946399e5d170d34539322/FLAG1027f1987 [2022-11-03 01:50:53,364 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:50:53,365 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2022-11-03 01:50:53,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/data/37b2499bc/9df84ca35da946399e5d170d34539322/FLAG1027f1987 [2022-11-03 01:50:53,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/data/37b2499bc/9df84ca35da946399e5d170d34539322 [2022-11-03 01:50:53,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:50:53,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:50:53,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:50:53,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:50:53,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:50:53,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:50:53" (1/1) ... [2022-11-03 01:50:53,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34451ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:53, skipping insertion in model container [2022-11-03 01:50:53,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:50:53" (1/1) ... [2022-11-03 01:50:53,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:50:53,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:50:53,980 WARN L230 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_87e5adeb-61d7-4058-8464-21d993b8b20a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2022-11-03 01:50:54,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:50:54,015 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:50:54,032 WARN L230 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_87e5adeb-61d7-4058-8464-21d993b8b20a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2022-11-03 01:50:54,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:50:54,068 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:50:54,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54 WrapperNode [2022-11-03 01:50:54,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:50:54,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:50:54,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:50:54,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:50:54,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,105 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-03 01:50:54,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:50:54,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:50:54,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:50:54,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:50:54,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:50:54,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:50:54,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:50:54,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:50:54,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (1/1) ... [2022-11-03 01:50:54,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:50:54,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:54,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:50:54,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:50:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:50:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:50:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:50:54,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:50:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:50:54,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:50:54,299 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:50:54,301 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:50:54,426 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:50:54,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:50:54,440 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:50:54,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:50:54 BoogieIcfgContainer [2022-11-03 01:50:54,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:50:54,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:50:54,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:50:54,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:50:54,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:50:53" (1/3) ... [2022-11-03 01:50:54,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd7f019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:50:54, skipping insertion in model container [2022-11-03 01:50:54,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:54" (2/3) ... [2022-11-03 01:50:54,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd7f019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:50:54, skipping insertion in model container [2022-11-03 01:50:54,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:50:54" (3/3) ... [2022-11-03 01:50:54,452 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound2.c [2022-11-03 01:50:54,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:50:54,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:50:54,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:50:54,555 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@6f02666a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:50:54,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:50:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:50:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:50:54,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:54,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:50:54,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:54,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1839711150, now seen corresponding path program 1 times [2022-11-03 01:50:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:54,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424847869] [2022-11-03 01:50:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:54,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:54,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:54,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424847869] [2022-11-03 01:50:54,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424847869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:54,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:54,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:50:54,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111880696] [2022-11-03 01:50:54,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:54,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:50:54,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:50:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:50:54,753 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:54,790 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-03 01:50:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:50:54,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 01:50:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:54,802 INFO L225 Difference]: With dead ends: 35 [2022-11-03 01:50:54,802 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 01:50:54,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:50:54,816 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:54,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 01:50:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 01:50:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:50:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-03 01:50:54,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-03 01:50:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:54,873 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-03 01:50:54,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (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) [2022-11-03 01:50:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-03 01:50:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:50:54,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:54,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:54,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:50:54,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1660498327, now seen corresponding path program 1 times [2022-11-03 01:50:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:54,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658512522] [2022-11-03 01:50:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:55,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:55,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658512522] [2022-11-03 01:50:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658512522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:55,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:55,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:55,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806813115] [2022-11-03 01:50:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:55,054 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:55,074 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-03 01:50:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:50:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:55,075 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:50:55,076 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 01:50:55,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:55,078 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:55,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:55,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 01:50:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 01:50:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 01:50:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-03 01:50:55,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-03 01:50:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:55,085 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-03 01:50:55,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-03 01:50:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:50:55,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:55,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:55,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:50:55,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1658830031, now seen corresponding path program 1 times [2022-11-03 01:50:55,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:55,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208602442] [2022-11-03 01:50:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:55,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208602442] [2022-11-03 01:50:55,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208602442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:55,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:55,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:50:55,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993857154] [2022-11-03 01:50:55,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:55,293 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:55,376 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-03 01:50:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:50:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:50:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:55,378 INFO L225 Difference]: With dead ends: 31 [2022-11-03 01:50:55,378 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:50:55,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:55,380 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:55,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:50:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-03 01:50:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:50:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-03 01:50:55,411 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-03 01:50:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:55,412 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-03 01:50:55,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-03 01:50:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:50:55,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:55,416 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:50:55,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1386799727, now seen corresponding path program 1 times [2022-11-03 01:50:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:55,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15324363] [2022-11-03 01:50:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:55,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:55,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:50:55,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417811073] [2022-11-03 01:50:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:55,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:55,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:55,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:55,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:50:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:50:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:55,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:55,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15324363] [2022-11-03 01:50:55,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:50:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417811073] [2022-11-03 01:50:55,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417811073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:55,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:55,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704898467] [2022-11-03 01:50:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:55,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:55,609 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-03 01:50:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:55,677 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-03 01:50:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:50:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2022-11-03 01:50:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:55,681 INFO L225 Difference]: With dead ends: 35 [2022-11-03 01:50:55,682 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 01:50:55,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:55,683 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:55,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 65 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 01:50:55,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-03 01:50:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 01:50:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-03 01:50:55,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-11-03 01:50:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:55,704 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-03 01:50:55,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-03 01:50:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-03 01:50:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:50:55,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:55,706 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:55,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:55,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1902825039, now seen corresponding path program 1 times [2022-11-03 01:50:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:55,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128168767] [2022-11-03 01:50:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:55,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:55,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:50:55,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263406651] [2022-11-03 01:50:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:55,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:55,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:55,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:50:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:50:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:50:56,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:56,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128168767] [2022-11-03 01:50:56,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:50:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263406651] [2022-11-03 01:50:56,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263406651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:56,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:56,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692202833] [2022-11-03 01:50:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:56,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:56,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:56,058 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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) [2022-11-03 01:50:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:56,116 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-03 01:50:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:50:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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 17 [2022-11-03 01:50:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:56,118 INFO L225 Difference]: With dead ends: 39 [2022-11-03 01:50:56,118 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 01:50:56,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:56,120 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:56,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 01:50:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-03 01:50:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:50:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-03 01:50:56,133 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2022-11-03 01:50:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:56,133 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-03 01:50:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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) [2022-11-03 01:50:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-03 01:50:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:50:56,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:56,135 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:56,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:56,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:56,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:56,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1311551190, now seen corresponding path program 1 times [2022-11-03 01:50:56,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:56,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637001545] [2022-11-03 01:50:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:56,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:56,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:50:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933986222] [2022-11-03 01:50:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:56,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:56,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:56,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:56,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:50:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:50:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:56,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:56,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:56,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637001545] [2022-11-03 01:50:56,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:50:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933986222] [2022-11-03 01:50:56,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933986222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701171153] [2022-11-03 01:50:56,549 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 01:50:56,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:56,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:56,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:56,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:58,676 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-03 01:50:58,779 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:59,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '716#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:59,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:59,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:50:59,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-11-03 01:50:59,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962175057] [2022-11-03 01:50:59,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:59,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:59,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:50:59,370 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 01:50:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:59,431 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-03 01:50:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:50:59,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-03 01:50:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:59,434 INFO L225 Difference]: With dead ends: 45 [2022-11-03 01:50:59,435 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:50:59,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:50:59,436 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:59,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:50:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:50:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-03 01:50:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:50:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-03 01:50:59,450 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2022-11-03 01:50:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:59,451 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-03 01:50:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 01:50:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-03 01:50:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:50:59,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:59,452 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:59,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:59,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1309882894, now seen corresponding path program 1 times [2022-11-03 01:50:59,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:59,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137075478] [2022-11-03 01:50:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:59,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:50:59,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228678493] [2022-11-03 01:50:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:59,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:59,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:59,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:50:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:59,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:50:59,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:50:59,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:59,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137075478] [2022-11-03 01:50:59,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:50:59,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228678493] [2022-11-03 01:50:59,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228678493] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:59,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:50:59,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-03 01:50:59,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792329832] [2022-11-03 01:50:59,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:50:59,901 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:51:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:00,001 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-03 01:51:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:51:00,002 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-03 01:51:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:00,003 INFO L225 Difference]: With dead ends: 42 [2022-11-03 01:51:00,003 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 01:51:00,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:51:00,004 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:00,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:51:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 01:51:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-03 01:51:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:51:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-03 01:51:00,013 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-11-03 01:51:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:00,013 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-03 01:51:00,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:51:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-03 01:51:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:51:00,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:00,022 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:00,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:00,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:00,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2092232782, now seen corresponding path program 2 times [2022-11-03 01:51:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:00,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996746641] [2022-11-03 01:51:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:00,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:51:00,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904142790] [2022-11-03 01:51:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:51:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:00,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:00,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:51:00,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:51:00,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:00,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:51:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:51:00,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:51:00,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996746641] [2022-11-03 01:51:00,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:51:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904142790] [2022-11-03 01:51:00,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904142790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326987097] [2022-11-03 01:51:00,496 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 01:51:00,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:00,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:00,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:00,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:01,712 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-03 01:51:01,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:02,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1296#(and (<= ~counter~0 3) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:02,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:02,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:51:02,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-03 01:51:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848563628] [2022-11-03 01:51:02,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:02,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:51:02,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:51:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:51:02,088 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:51:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:02,363 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-11-03 01:51:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:51:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 30 [2022-11-03 01:51:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:02,365 INFO L225 Difference]: With dead ends: 47 [2022-11-03 01:51:02,365 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 01:51:02,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:51:02,366 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:02,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:51:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 01:51:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 01:51:02,367 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) [2022-11-03 01:51:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 01:51:02,368 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-11-03 01:51:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:02,368 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 01:51:02,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:51:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 01:51:02,368 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 01:51:02,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:51:02,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:02,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:02,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 01:51:02,796 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-03 01:51:02,797 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 01:51:02,797 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2022-11-03 01:51:02,797 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2022-11-03 01:51:02,797 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-03 01:51:02,797 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2022-11-03 01:51:02,798 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2022-11-03 01:51:02,798 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 01:51:02,798 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-03 01:51:02,798 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2022-11-03 01:51:02,798 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2022-11-03 01:51:02,798 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) (and (= |ULTIMATE.start_main_~t~0#1| 1) (= |ULTIMATE.start_main_~s~0#1| 1))) [2022-11-03 01:51:02,798 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-03 01:51:02,798 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-03 01:51:02,798 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-03 01:51:02,799 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-03 01:51:02,799 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-03 01:51:02,799 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-03 01:51:02,802 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:02,804 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:51:02,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:51:02 BoogieIcfgContainer [2022-11-03 01:51:02,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:51:02,824 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:51:02,824 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:51:02,825 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:51:02,825 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:50:54" (3/4) ... [2022-11-03 01:51:02,828 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 01:51:02,834 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-03 01:51:02,838 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-03 01:51:02,840 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-03 01:51:02,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 01:51:02,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 01:51:02,874 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 01:51:02,874 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:51:02,875 INFO L158 Benchmark]: Toolchain (without parser) took 9132.68ms. Allocated memory was 98.6MB in the beginning and 211.8MB in the end (delta: 113.2MB). Free memory was 57.0MB in the beginning and 137.8MB in the end (delta: -80.8MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,875 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:51:02,875 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.98ms. Allocated memory is still 98.6MB. Free memory was 56.8MB in the beginning and 74.9MB in the end (delta: -18.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,875 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.33ms. Allocated memory is still 98.6MB. Free memory was 74.9MB in the beginning and 73.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,876 INFO L158 Benchmark]: Boogie Preprocessor took 43.19ms. Allocated memory is still 98.6MB. Free memory was 73.2MB in the beginning and 72.3MB in the end (delta: 891.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,876 INFO L158 Benchmark]: RCFGBuilder took 292.76ms. Allocated memory is still 98.6MB. Free memory was 72.3MB in the beginning and 61.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,877 INFO L158 Benchmark]: TraceAbstraction took 8378.60ms. Allocated memory was 98.6MB in the beginning and 211.8MB in the end (delta: 113.2MB). Free memory was 60.7MB in the beginning and 140.9MB in the end (delta: -80.2MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,877 INFO L158 Benchmark]: Witness Printer took 49.83ms. Allocated memory is still 211.8MB. Free memory was 140.9MB in the beginning and 137.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:51:02,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.98ms. Allocated memory is still 98.6MB. Free memory was 56.8MB in the beginning and 74.9MB in the end (delta: -18.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.33ms. Allocated memory is still 98.6MB. Free memory was 74.9MB in the beginning and 73.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.19ms. Allocated memory is still 98.6MB. Free memory was 73.2MB in the beginning and 72.3MB in the end (delta: 891.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 292.76ms. Allocated memory is still 98.6MB. Free memory was 72.3MB in the beginning and 61.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8378.60ms. Allocated memory was 98.6MB in the beginning and 211.8MB in the end (delta: 113.2MB). Free memory was 60.7MB in the beginning and 140.9MB in the end (delta: -80.2MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 49.83ms. Allocated memory is still 211.8MB. Free memory was 140.9MB in the beginning and 137.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 430 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 275 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 323 IncrementalHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 165 mSDtfsCounter, 323 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 192 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 40, 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, 8 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 38 PreInvPairs, 60 NumberOfFragments, 171 HoareAnnotationTreeSize, 38 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 407 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 129 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 666 SizeOfPredicates, 6 NumberOfNonLiveVariables, 380 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 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: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: a * a + 1 + 2 * a == s && a * a + 2 + a * 4 == s + t RESULT: Ultimate proved your program to be correct! [2022-11-03 01:51:02,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87e5adeb-61d7-4058-8464-21d993b8b20a/bin/utaipan-7li7fVZpFI/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